I don't think comparing people who were judging the best quality of sound and the most accurate reproduction of sound to consumers' personal preferences in musical genre makes for an accurate analogy.
If you like a flat bass response, that's fine. I was just pointing out that most people don't and that's not how it will be naturally produced on most decent systems, so if Audyssey wanted to make more people happy, an option that aimed for the middle of the bell curve might give more people results they are happy with vs. only having a default that aims clearly outside the bell curve.
Of course the exact amount of rise in the bass region for any individual will be dependent upon equipment, setup, room and personal preference. For those that want to take it to that level, XT32 with the App, Dirac, Anthem as well as all higher end systems I'm aware of do allow for adjustment. But for the non-tech savvy who may stop after "pushing that one button," many of the others offer such curves as defaults or easily selectable options. It's possible, but not necessarily that easy for users of XT32 and the app to do the same.
A concert hall is not an anechoic chamber. Far from it. I don't know of any concert hall that would provide a flat response at the listening position from a speaker, musical instrument or voice to 20K, it's not really possible. In the bass region, some will have more rise than others but there's certainly no general rule that they'll all be flat. Here's an example of measurements from six different concert halls, from five different seating positions in each (the top row "R1" depicts being seated toward the front in each hall):
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As you can see, even in a concert hall, a flat bass response isn't the most common way we hear music.