I think that the distinction is much more "what is fun or immediately rewarding" then "what rationally will be useful". Kids know they need to learn foreign languages, but until they are at high enough level adults gotta put a lot of effort into kids actually being willing to learn. It is just boring grind and most kids have hard time to entirely overcome that. But when it is fun for them, they will learn the hell of it regardless of how useless it is. Also, Netflix and Youtube are motivating factors only once the kid understands at least little bit. They are rarely eager to watch and listen videos they dont understand.

I also think that most kids do actually learn a lot math in schools. Some don't and are totally clueless, but most of them are acceptably good and most of them don't make all that much fuzz about having to learn it.