It’s fun to care

The cool kid scoffs at the jocks training so hard and the geeks for getting dressed up in cosplay.

The cool kid doesn’t try and doesn’t care about anything.

Well I think he’s missing out. 

The more you care, the more effort you’re willing to put in and therefore the more likely you are to succeed.

Also it’s fun to care, it makes for a more exciting time and you enjoy it more.