I’ll make this very simple:
1. It will make for very easy communication between you and your band members / leaders in terms of how you want to perform a certain part of a song, in what key, in what time signature, etc. You have no idea how easy it is to convey an idea in music when everybody understands the terminology. Learn music theory to improve your performance potential as a band.
2. It’s not as hard as you think. If you can do basic arithmetic (I’m talking about addition and subtraction, here) and know how fractions work, you can get through Music Theory 101, which is essentially what I will be covering in these lessons.
3. It will help you understand what you should play and why it works. It will make you a better musician and give you the freedom to know what works and what doesn’t.
4. You won’t regret it.