School isn't just about learning what it is interests you. It's about immersing you in the mechanics of society. They want to expose you to your peers in age at an early age, acclimate you to the work environment (ie: going somewhere you may not want to go to do something you may not want to do) for limited instantaneous reward and vast potential reward, and teach you HOW to solve problems in general as well as the specific ways problems have already been solved.
You guys say you want to just learn the shit you're interested in, but how do you know what you're interested in if you aren't even exposed to everything there is yet? I mean, if you want to flip burgers for the rest of your life don't you need to know how to read "medium rare with lettuce/tomatoes/pickles and ketchup" first?
Barring trade schools and private schools, it's not until after High School that you can really be considered qualified enough to learn many specialized subjects.