Theory gives you more tools with which to be creative and original with! It doesn't make you stale, boring, or soulless (all things I've heard in defense of not learning). People that are true masters of their trade and who create beautiful, original, and functional items or services (whether it's instruments, furniture, etc.) all have a mastery of the techniques and tools associated with their trade. They don't lock themselves in a room with a log and a Swiss army knife and create just on the merits of their "originality" or "soul". Do yourself a favor and put your great ear to really good use and let it help you learn your tool and your trade better!
