That's because, no offense, I think you need to re-read because your reactions don't correlate very well to what you're responding to. Briefly, key points.
- @amirm writes that EQ should be mandatory in a playback software (here, Tidal). I replied with my opinion streaming audio sources are the wrong place to put (P)EQ, for reasons spelled out above. However, I merely took the opposite position from Amir, i.e. "not mandatory." I never went beyond that to "should not be included." Lots of features in various software are stupid and useless to most users, but if those features don't actively hurt the user experience who cares? The same applies here: not mandatory, but who cares if it's there, so long doesn't muck up the UI for people who apply their PEQ in more sensible locations on the signal chain,
- Whether an individual cares about fidelity or not is not a key point. The key points are
- Parametric EQ, regardless of the target curve, is a tool used to tune listening environments such as interactions between a room and a specific set of loudspeakers in a given placement with a given listening position, or headphones. That is distinguished from tone or tilt controls, which are used (by people who use them) to adjust the tonality of specific content.
- EQ in the streaming player software is underinclusive (not in the signal chain for other sources)
- EQ in the streaming player is inconvenient (a pain to have to mess with EQ in the playback software when switching to different listening environments)
- Point taken that if one only listens to one source in one listening environment, the playback software is as good a place to any to put PEQ. But does "one source, one listening environment" describe many members here?
- I realize this place is gaga for separate DACs for reasons I don't quite fathom, as separate DACs are superfluous for most people. Regardless there is an obvious functional reason to include a volume control on the back or deep in a menu (not prominent, where someone can screw with it) of a separate DAC for systems in which they are actually useful - gain staging/level matching. Admittedly, "why don't amps have gain controls?" is a sore spot but the sad fact remains that most amps marketed as home hifi products do not. So gain staging has to happen upstage of the amp in the rare system where a separate DAC is a relevant component if you use 'hifi' amps. (Pro amps usually have attenuators.)
- Funny you mention volume control from source. I actually find that annoying compared to having a master volume control for each listening environment, so that each listening environment has its own control and the playback software doesn't muck with it. A few times I've wondered why something's so quiet despite a nominally high playback level, or why the system was cranked up so loud, only to find the expected relationship between master volume level and output level was broken because somebody messed with the volume control in their Music nee iTunes instead of more sensibly using master volume. I don't know how other companies' products do it because I don't have the time or inclination to use them, but Apple manages system-wide volume control for multiple listening environments over AirPlay and BT very well. Basically it remembers your last master volume level for each listening environment.
I feel there is a bit of padentry going on here, the first two points (where you want to emphasize Tidal, when I and Amir are talking about ALL playback software, so there really id not point in spelling out Tidal since that's the topic OP started, it simply goes without saying). And the second point about how you want to clarify you're not making ought claims (which I understand, you are simply talking about your preference which is fine). Then there's the -which I take to be a retraction- of the original claim about EQ being for people who care about fidelity, which I also assumed but didn't want to presume was a typo on your part prior.
We're still left with the primary questions I posed prior. What exactly is the actual problem of having PEQ in all playback software? You made the claim about UI conflicts now, and prior you made a claim about causing confusion and inconvenience (which I've addressed can be easily bypassed, and PEQ in general could be ignored, which also shows PEQ somehow being a part of a software stack featureset doesn't necessitate it's required end-user employment).
Then there was a thing about DAC seperates. Not quite sure what that has to do with anything particularly, but it seems like a subjective claim that's more apt for audiophiles in general (the more subjectivist leaning for sure). Most of the people I know would love an all-in-one device. It's just it's rare to find any good ones (for good reason, more expensive, less profit, and much more R&D to develop). I agree though in general, people fascinated with separates from a performance perspective are a bit irrational. But then again, would you really want every single DAC to also be a steamer, amp, speaker amp, media server, etc.. ? I wouldn't (not because of those features not interesting me, but because I don't want to have to pay for all those features, when all I need is a DAC with perhaps basic functions).
The only reply to the primary question now seems to be something about "well someone messes with the volume control" (which I take to now be the newest argument that can be leveled against PEQ, since I've addressed all the other reasons against including it). Am I going to far in assuming that's the actual critique against having PEQ as an option in some fashion in all playback software? That your kid might mess with your phone and your PEQ is messed up?
To me, PEQ lacking in playback software is about as stupid as buying one of two DACs where all eles held constant (even price), the purchase of the one without volume control seems like a niche purchase at best (to avoid having your kids or someone mess with the volume I suppose), and stupidity at worst. Likewise I can't understand why having PEQ in all playback software in some form is a negative for you. I understand you wouldn't have a use. But I can simply invoke the mainstream (where people with their iPhones listen to music yet have no EQ control in sight). I'll repeat myself. The cost-benefit analysis against your position is so skewed, this is why I am having a hard time rationalizing why PEQ in playback software would be considered "BAD" in your view given that such a function adds quite a bit of value to almost every listening setup.