tapper mike wrote: accidentals happen all the time but mostly hit and run
FWIW, I wouldn't let anyone dissuade you from learning theory. You're clearly not pursuing it in a vacuum as you are also playing and practicing as well.
My personal view is that music theory is like studying any science. It provides an understanding of what is (i.e. why certain chords sound 'right' together, or why certain notes don't). I don't see theory as a set of rules that need to be followed (i.e. it's quite ok to color outside the lines - some of the best music ever written dares to go beyond the conventions of theory).
I was trained old school, with a balance of instrument lessons and classroom theory. And in all the years that have followed my formal training, I have definitely grown as a musician and composer. However, I've forgotten much of the actual theory even though it is the basis of my overall understanding of performance and composition. I could never attempt to give an explanation like JJFlash's excellent circle of 5ths post above. But I do thoroughly understand it.
Cheers
-B