Okay, so being a High School Math / CompSci teacher, I think it is important to learn most math topics. Students might not see the practical applications immediately, but it is helping them become better people, more educated, and problem solvers. So, you might not directly apply calculus to your life, but the problem solving skills that you will inherintly learn from the course you will use. And obviously if you become a physicis, computer scientist, engineer, etc. you will use it. And hey, ask and lighting, scenic, designer if they use calculus/geometry/algebra!!!
you gotta love math...