School wasn't made for you to learn things like you think they are.
No, you will never need to use Calculus in your daily life.
No, you will not need to write an essay on how shitty your job is.
Fact: you only use 7% of the things you learn in school in real life (most things being from English).
Why do people make you do this?
To build your learning skills. For example:
Math helps build your critical thinking skills.
School wasn't made so you can become a major in everything you learn there, but rather to help you in everyday life.
So don't bitch about simple homework.
Also, if you think that's bad, try taking 3 AP classes at once.