this is just how capitalism works - you have to appeal to your audience more than your competition, and guess which kind of content teenagers want to watch more. Hell, even adults want fun content as opposed to educational content.
they're not willingly selling a worse society for profit, that's just the only way to stay competitive.
any platform that pushes educational content in North America would just not get any customers and go bankrupt.
edit: there's plenty of educational video platforms out there, like Khan academy. Try and get your kids to scroll through that during their free time instead, I bet they won't.