If 20+ years of school is what you want, go for it. But a lot of people want to move on sooner, and so we should use the first 12 years of education efficiently

If 20+ years of school is what you want, go for it. But a lot of people want to move on sooner, and so we should use the first 12 years of education efficiently. High schools don't get to just pass the buck onto the college system for all the kids that they failed to educate. And students who don't use their HS opportunities well shouldn't have the excuse that they will just get a HS do-over in college (at taxpayer expense).