I think any strong math instruction should allow for most children, capable of calculus, to go further. You have to do multivariable calculus in engineering.
I don't think the general population of parents will push. It is also same attitude about CS. DD's school is a private academic. Most kids took the first AP CS course in python. They don't pursue the second AP CS course in java. DD now is so involved in CS, she knows 7 languages. She does free lance CS jobs and makes a good amount of money doing it.
