It would be great if the circle of confusion was the best argument, but the honest reality of day to day record making is that you would be in a very, very privileged position, and in a very, very tiny minority of audio engineers if the level of detail in a recording came down to an argument over ATC or D&D speakers.
Detail in audio recordings is created just like detail in any other engineering project. The quality of each and every component used, the quality of the various people involved in the collaborative process, budgets, time constraints, deadlines, politics. A speaker isn't going to improve a performer's note articulation. A speaker isn't going to improve the attack of an instrument. A speaker isn't going to make an average microphone sound better. A speaker isn't going to make a poor recording space sound better. A speaker isn't suddenly going to give you more time to deal with more and more sonic detail. Bigger budgets on the other hand? Sure. You can't fudge detail in post - If you want to move from that standard kitchen design to something highly detailed, somebody has to pay for it. The same applies for making records.
Don't get me wrong, it would REALLY be great if detail in audio recordings was the result of simply tossing a pair of D&D speakers into a production suite... but it isn't remotely that simple. Day to day work as an audio engineer can be gruelling and exhausting. Going in, day after day, endlessly batting for better audio quality across the entire process. It is a daily battle against what has essentially been decades of continuous downward pressure from the industry, an endless list of closing studio facilities, the rise of home recording, etc. It is a real shame that some people here would prefer to call audio engineers 'elitist' or 'egocentric', when really... they are your greatest ally in the plight to better sound quality. They just have a list of challenges they face on that plight that is unfathomably longer than most people here could imagine, with often many higher priorities than indulging endless ATC vs D&D debates.
I reckon you could kit out two separate production facilities - one with D&D and one with ATC, and you wouldn't really notice any conclusive difference to recording quality from the two. The circle of confusion is a great academic concept, but it doesn't remotely begin to take into consider what really goes into making recordings, at least not in the way many people choose to use it in an argument on ASR. Any passion for speakers or better sound quality is great, but when it comes to making recordings with specific 'sonic goals', that inherently puts the circle of confusion within the context of the recording industry, which is currently built on paying $0.01284 per stream on tidal or $0.003 per stream on Spotify.