First of all, I hope your desire not to go to school is not inspired by all those pictures on the Internet saying that Bill Gates and Mark Zuckerberg “did not go to school” and use them for poster boys of how school is not important.

Let's just get it clear from here that they did go to school, however they dropped out of college when they realised that they were on to the next big thing. But let's look at some factors that made their situation unique.

They had mad skills. They may not have been the best programmers in the world but they definitely had a skill which they honed and put to good use.
They left school when they were working on something and if you're just sitting on your bum all day you better agree that you're not on the right track.
You never hear the story of those who did the exact same thing but failed, someone else left school to work on a project and today he is sitting somewhere regretting it, but the media won't tell you that. There is a selection bias at work here.