In my own direct experience, the most repressive attitude toward music itself that I've encountered involved a small denomination that allows singing, but with no instruments; I consider that to be regretable, and without any justification from either the Bible or any coherent Christian tradition,

Incorrect. The Eastern Orthodox Church does not use instruments in its worship. It is a very large swath of Christianity, and as coherent as any.

Changing the subject slightly: I think, buddhuu, the problem with your analogy is that denying ALL music and denying rock-and-roll and/or jazz to one's constituents aren't even on the same level. They're not even in the same ballpark. They're not even playing the same sport. I may not want my child to listen to rap songs that glorify slapping one's bitch ho and shooting police officers, but that's not even LIKE the same thing as not wanting her to experience music at all.