It's okay to be taught stuff in school that you'll never need again in your life. Because if you only know and do what you need, it's called survival, not life.
It took me quite a long time to realise of, yes, I never needed to learn about Greek mythology using poems written by people in the 18/19th century, but it's good to know.
There might be better things to learn, but there is basically nothing one should not learn. Knowledge is human kind's greatest treasure. Enjoy learning it.
This is my personal microblog. It's filled with my fun, joy and silliness.