If you do not know A^2 + B^2 = C^2 you are not a civilized human. Also learn how to spell Algebra.
The most important algebra and geometry do is teach systematic logical thinking. No emotion need apply! For many people it will be the only times in their lives they’ll be exposed to that. They don’t have to make A’s in it; end up being mathematicians. They do need to be forced at least once in their lives to think in such a focused way.
Don’t be a jerk.