I think there is always a bias toward overvaluing more readily available and understood metrics. It is relatively easy for me to look up on ASR that some Topping DAC or amp has 120 dB SINAD, where the meaning of this value 1) is readily understood by the (intended) audience, and 2) should perform about the same for everyone who has one. I don't need an APx555 or a Klippel as long as someone (who shares measurements on equipment I'm interested in) has one. They can even help interpret the results - how convenient!
However, there are swaths of factors out there that influence our audio enjoyment/fidelity which are not easy to understand, are specific to your listening environment, and are costly to measure (time/money/both). I feel there is a tendency to irrationally underscore the importance of these things. I wonder how many of us know the (approximate) SINAD of our electronics but not what our room's RT60 is. Or whether my front towers are interacting with each other in an undesirable way, oblivious to me since I only ever measure them independently. Or whether I should have my grills on or off. Even if you did measure, no one is going to interpret these results for you and help you understand what is holding back your setup (except for the nice people of the
Room Acoustics subforum). I would expect probably some or all of these to influence sound reproduction more than graduating from 90 dB sinad to 110 dB sinad would, and yet I have to fight the tendency to occupy my mind with comparing power and distortion figures.
In fairness, these listening environment-specific topics are discussed, and probably moreso on this forum than subjectivist ones. But I think they're far off occupying a share of the discussion proportional to their influence on our fidelity. I'm not sure that will ever be a reasonable expectation to have, since I can't really get Amir or other ASR users to spend time on
my couch listening to
my gear. The only specifics we can discuss are gear, so gear we focus on.
What we can learn from a perhaps ideal version of subjectivism is the self reflection to truly listen to what you're hearing and ask yourself what is preventing you from enjoying this
more. If you don't even know because you've never heard truly superb stuff, then make solving that a goal of yours. The answer may be something you couldn't have measured at all, like that playing at volume levels I would really like get me a knock at the door. As frustrating as it is to have a problem that costs $500k to solve instead of $500 (a house instead of a new amp), I think it is an important step on the path to audio enlightenment. Similar to the beliefs I've come to hold in engineering, objectivism/the focus on measurements is a very useful tool to have in your toolkit, but it shouldn't be your only approach. Sometimes your senses can tell you things measurements can't. Often measurements can tell us things no senses could. Figure out what you're after, and bring the right tool for the job.