This is entirely the fault of people saying "abolish x" when they don't actually mean "abolish x", unless they actually do mean "abolish x" which is stupid. It's a standard althusserian take that school does these things except never has anyone thought they wanted to end schools because, and I know it is shocking, they don't say "abolish schools". Neither does Foucault tbh, he doesn't really say what you "should" do with anything.