this is a moral judgement and a strong claim. I can think of a few types of knowledge off the top of my head that aren't making the world a better place
Something like learning how to tie a noose: this is (in most cases) bad knowledge. This isn't something anyone should learn unless they need it for something that isn't its best known purpose
when it comes to something like race/gender/etc, I can't think of one positive usage of that kind of knowledge, if we can even call it that. I'd argue that even the idea of race/gender/etc is against the goal of equality and if we want true equality these ideas need to be discarded