Yes, I think so. The alternative is that it doesn't.
As far as we know, no music has lived for more than two thousand years (yet), so the alternative seems to be the rule, even if there turn out to be some exceptions, such as the music of North Africa, which is heading for 1,300 years as a living tradition now.
Whoever benefits, benefits. I do happen to know that Mozart isn't benefiting, nor his family But I won't say that no one is benefiting, or should benefit, from the fact that what he did has had an extended shelf life as a marketable commodity.
Absolutely. Resist Authority. Fight the power. Make up your own mind. Don't accept that even those who argue authoritatively, sanely and persuasively (such as yourself) are necessarily right.
MG