Why do they absolutely hate all hobbies and interests of mine?

I'm (16F) a highschooler who depends on her hobbies and non-academic interests to live. I have a narcissistic father and a really manipulative mother and both of them constantly pressure me to be very successful at school. I'm burning out like crazy. The only thing that makes me happy and keeps me pushing are the extracurriculars or activities I do, like debate or theatre. Even though I literally do these activities with the school clubs themselves they still scream at me for it. Whenever anything negative regarding my mood or my grades ever happens (which they're usually the reason for) they blame it on my hobbies and threaten to take me out of this school, move cities so that I'll "be friendless and have no distractions in focusing on studying". Why do narcs always do this? Is there an actual explanation?