I agree 100% with Rudy. You have to remember, there was music long before there was theory. I think theory is a way of explaining what WAS done, WHY it works, and HOW you can make music without having to go through all the trial and error the oldtimers did.
I don't see it as much different from learning math. I mean, the earth has always revolved around the sun, but without math we may not know that, and we certainly wouldn't know why, now it's common knowledge that can be applied to other things as well.
UKRuss is also right, knowledge IS the bomb!!!