I'm new to this forum, though I've been a regular browser.
I only actually joined because there's a bass for sale that I'd like to buy.
I studied at music college for a couple of years, I have had loads of hours of private tuition from various players, Steve Lawson and Todd Johnson to name but two of them. I alos put in countless hours of personal study from books (I have dozens), and the internet, I love music, and love learning about it.
I play funk and jazz mostly, and can play pretty much any style of music if needed.....and I mean play, not just plod along playing the correct root notes (or what I hope are the correct root notes!).
I can't work out how you can play with other musicians if you don't know what notes you're playing, it to me sounds like buying a Swedish phrase book, tearing off the side of the page with the English words on, and then going to Sweden for a holiday, sure you're coming out with Swedish words, but are they the right ones lol!.
You go to a jam or audition, someone gives you a chart with a few chord symbols on it, say Eb maj, Bb min, F7, how do you get on if you don't know where those notes are, and what notes you can play over those chords.
What will the other musicians think if you're stood there plonking away trying to hit a right note, or do you only ever play in one key ?.
And as for people telling Bilbo that he's talking b****cks, sorry but he's not, you are.
He's giving someone advice about learning some basic theory, basic theory can be learned in a few weeks, with the minimum of effort, and will give a lifetime of rewards.
Staying ignorant and only playing in a limited comfort zone is fine, but believe me, having a bit of knowledge and being able to step out of that zone is a magical thing, don't knock until you've tried it.
Some of the worlds greatest players couldn't read music, but that doesn't mean that they didn't know any theory, they're two different things.