Easy generalization, more complicated reality.
My kids hate most of the newer stuff I've been checking out. They think it's weird and not cool.
Then again, they dig the Beach Boys and have friends who wear Led Zepplin t-shirts and shit. I actually bitched out a 16 year old girl for wearing a Zep T. Told her that htey had broken up before she was even born, so what's she doing listening to her parent's music? She was all like "What EVER. It was a great band!"
There's some nostalgia for ya'.
I don't like too much, hardly any, in fact, of what the kids listen to. I think it's monodimensional and boring.
And if "kid's music" was so damn interesting, you'd think I could find at least one radio station (or MTV video) that holds my interest for more than 30 seconds. No luck.
Hell, one of the most interesting things I've heard lately is something that Dusty Groove doesn't even carry any more because it didn't sell well for them.
I think you should make a distinction between "children" and "young creative talent". There's a gazillion of the former, and they rule the bizness, even/especially those marketed/hyped as "underground" (more of the same, that bunch is). Far fewer of the latter, and they are way, waaaaaay undergrond. And they're not "children", unless you look at anybody old enough to be your offspring as a "child". Dangerous game that is....
I know what kids listen to & enjoy, and have for several decades now. When you get grandkids, you probably will too. And like me, you in all liklihood will not be impressed. At all.
Until then, easy generalization, far more complicated reality.