The only observation you forgot to add was people's apparent complete inability to suppress their narcissism long enough not to make a churlish one-line comment dismissing something as immediately unnecessary.
Streaming music is still in its infancy, relatively speaking. Experimenting with different organizational and delivery schemes I think is perfectly reasonable, whether or not it personally affects me. That there are people like me who find Apple Music's UX so awful that I wouldn't even use it for free and prefer Spotify (as there are, I'm sure, many people who feel the opposite) is justification enough that a genre of music with very different inherent organizational structure might justify a completely separate app. Or maybe its only justification is for Apple's marketing goals, as a way of drawing an audience into Apple Music who might not otherwise consider a streaming service for whatever reason.
There's zero need to be dismissive as a means to an end.
