I see your argument and think it's important. However, I think it's probably also true that the existing and historical models for rewarding musical talent exclude some people. The question then becomes, which models are better overall and less exclusive.
On the whole I'm not convinced that there is much value in retaining the horribly exploitive traditional model of the mega-powerful recording studio.
No, I'm not arguing for the corrupt "record company" model. A model that, actually, appears to me to be propelled in good part by psychopathic (in the clinical sense), type A and often extroverted personalities.
I just don't want to see such ideas become another form of discrimination against introverts. In many fields, introverts end up being placed at some disadvantage by extroverts who argue that they should simply "suck it up" and "put themselves out there".
Ultimately, I guess it's "survival of the fittest". In my perspective, however, too much of such attitude makes for an unhealthy society. (At which point, we have to get pissed enough to (meet and organize on Facebook, and) rise up and kill all the lawyers, etc., etc. ;-)
On the whole I'm not convinced that there is much value in retaining the horribly exploitive traditional model of the mega-powerful recording studio.