And the math schools concentrate on isn’t particular useful in the context of a modern society. So what that you once memorized a geometric proof long enough to take a test if you don’t understand how interest works and how credit card companies take advantage of you.
That some people need kidney dialysis is not an argument that everyone getting kidney dialysis is the only way to stay healthy.
If you can't learn from books or videos or online lectures or parents or tutors, I doubt generic schooling is really going to be able to help much either, but if it does great. People learn in different ways and different kids need different resources, but that's an argument against a one-size fits all public schooling system, not in favor.
