[biotech]

you have kids hitting Multivariate Calculus and Differential Equations who haven't seen a proof in their lives.

Really? My AP Calc class was not very proof-focus (probably because the AP Calc test was not), but 10th grade (~15-16 y.o.) Geometry was mostly just proofs. As was Trigonometry. This was 10 years ago, but those same teachers are still at my old school. Presumably they teach the same material. I guess this is atypical? That's too bad, because those trig proofs were actually kinda fun.