No, it's not "kids don't care," it's "we have a formula that sells, and those who don't like it aren't in the target demo anyway." Kids don't care because kids don't know. Sure, they know about all the animated Disney movies, but most of the time you have to buy them. Even then, most of them with an artificial expiration date so it can go away for 10 years and come back so they can add like 2 bonus features and then have it go away for another 10 years. And don't act like this is new, either. They've been doing that since the VHS era. I still think the whole "we can't release Snow White on video, because it's too classy and artistic" stuff was all an act, trying to get the public to want it more, like it was some big, special, secret thing.
As for the TV shows, I'd rather them release the classic ones on DVD or Netflix or hulu or something than to see the same half the series run over and over. I never understood why they can't have all the episodes of something when they rerun them. Even classic TV channels pull that crap.
That said, there is nothing wrong with splitting up channels to focus on specific focuses. That way, less of the programming is in danger of disappearing totally because they're trying to get a specific focus group. Disney knows what it's doing, like the programming or not. It didn't need to go through an embarrassing level of scrambling for an audience, alienating the loyal group you already had to go after one that's happy with the programming they're watching now. That's what Cartoon network did ever since Hanna Montanna hit it big, creating awful live action shows (or rather stealing them from Discovery Kids) that no one liked or watched. Yet were considered such a great idea, they were kept on the air, and you were forced to like it, which made CN watchers even more angry. Sure, they run like a handful of shows over and over (benefit of the doubt- it could just be the summer schedule), but they're the network's strong shows that have measurable fanbases both on and off demographic.