Spooky-relevant post to my college talk the other day, and perhaps the answer that I was looking for. Quitting school would make me like Sparta, basically. It is not strategic thinking.
As for Eric, I think the most important thing I noticed was that you mentioned all these things you were scared of. What was especially telling to me, is that you are afraid that if you drop out and fail at music, you'll be fucked. This is valid. But what about the flip side? What if you fail at "regular life" and you leave the music route unfulfilled? You end up with a job that you hate or that you suck at, a degree you don't need, and a sacrificed music career always sitting on your shoulder going "what if?"
We're young, and I think it's fantastic that we're thinking about these things now. We have to be careful, though. Talking about things, I believe, is your mind's way of relieving itself of the responsibility of doing them.