Depends If you’re being hired to wire the venue or play the gig!
The absence of formal theory training doesn’t negate ones input or creative ability. I’d struggle to name concepts in grammar apart from maybe ‘syntax’ but it doesn’t mean I’m unable to communicate or be understood by people around me. It’s rare when a drummer or guitarist has said “Nice groove, I’m digging the flat third on bar three and the triplet you played on the turn around.” They might be more inclined to just lock in and play and do that wee look and a nod.
You learned grammar theory at some point. You have just forgotten the terminology over time.
I was stating a personal preference. You do you.
I would rather not work with musicians who have no theory knowledge. Using theory terms, my guitarist, keys player and I can resolve any musical issues in seconds. If something sounds "off", we simply stop. I'll ask the guitarist to name and play the chord he was playing. Then I'll ask the keys guy the same. If they aren't playing the same chord, we'll figure out which one is correct and move on. But you can do that when the conversation goes like this.
Me to guitarist - "What are you playing there?"
Guitarist plays chord and says - "C9"
Me to key - "How 'bout you?"
Keys play chord and says - "C7 and I learned from sheet music so I'm pretty sure it's the 7."
Guitarist - "Ah. Cool. I learned it by ear and thought it was the 9. No bigger. We'll play the 7."
Now, if none of us knows theory, we gotta keep playing the chords over each other and listen back to the track over and over until we can convince one of them that the D over that C chord has gotta go.
So, IN MY VIEW, being surrounded by people who speak the language is much easier, and doesn't take away from the groove at all. Nobody on Earth ever had a ton of groove and then lost it by learning theory. Ever. Never.