I have an anecdotal theory that most people who came prepared to a STEM programme in the States last century did so despite, not due to, the modal 7-12 teaching. (if true, I hope it no longer is?)
Most teachers in the states did poorly in math, and never loved it. They in turn can't pass a love of math on. They are good enough at math to pass the tests, but that isn't why they are teaching.
