Why Are Parents Forcing Kids To Study?

I don't get why parents and teachers are forcing us to study when they know we hate it. And when you ask them they'll say "This is for your own good." and "It's you taking the exam not me." Translation- It's you taking the exam so you have to study and if you get horrible marks we'll be sad. I don't get them! They say we study for our own good then why are they the ones who are crying not us? And if we get good marks they'll be like "You see, if I didn't tell you to study you wouldn't get such good marks." This world is just so messed up......