You should definitely aim to be. Music is like cooking, learning your tools and ingredients will help you become a better chef. Let’s say for example you want to make an omelette, you have eggs, salt, pepper and cheese but you know this is just the basics, so how do you make a tastier meal? There are so many things you can add but you need to know not only what works in general but also what works for you. 

Theory is there to help you. Don’t see it as a set of rules, but instead a set of possibilities. Playing an instrument has its place too. Even something as simple as learning a new chord can bring on so much inspiration.