You can use all of these things without you personally knowing calculus. The point of the question is that it's posed by the people who aren't going to go on to create weather reports, credit card payment systems, video games, etc.
Heck, I don’t use calculus directly in my daily life. But I’m glad I took it because I recognize where it is used, and how, and that helps me understand my world better then without.
I don't think so. If you're in high school and you ask this question, you surely do mean something like "what activity will I possibly doing in my future career that would require calculus" and in that case the answer that you may be a financial analyst, a meteorologist, an electrical engineer, etc. is right on. It's exactly what kids want to know.
But now there's this myth that "you won't ever use calculus in real life" which is totally wrong.
to reason.
it would be great to teach people critical thinking. at every age, at every year.
applied epistemology, rationality, etc. of course no need for those fancy words.
... and during those lessons at one point they could learn about the usefulness of models, and the usefulness of math, money, programming, etc.
but otherwise there's no point in ramming math/programming/finance directly into the heads of kids.
(This is why I think the recent brouhaha about California changing some requirements completely misses the point... but meh. Education is like healthcare, completely broken and fucked in all the ways it could be.)
... except most of those are cheap. So. Hm.