It’s sort of a foundational principle of the American system that power will always overreach, and adversarial checks and balances are always required to keep power in line. Saying it’s ridiculous to teach kids about their rights is, in that light, roughly comparable to saying it’s ridiculous that the government produces documents (i.e. the Bill of Rights) asserting what it can’t do. Far from being ridiculous it’s about as fundamentally American as it gets.