Because people constantly lie, shit is often confusing. American schools, for example, are actually pretty good, yet people constantly complain about them. Why?
Once you understand the real reasons for things, you can dispense with a lot of confusion. But our culture of taboos around various subjects leads to a lot of lying.
If something doesn’t make sense to you, chances are, you’ve heard a lot of lies about it. Look for the truth–even if that truth violates some taboo.