I have nothing against people who read and know theory. As I've mentioned in previous posts regarding this subject, I've lost many gigs due to not having these skills. And I certainly don't think people who have this knowledge are deficient in being able to groove. That would be a stupid statement.
My main opinion is that a mainstream listening audience at a gig will mainly get off on the music being tight and in the pocket, even if it's one root note being played.
If I get asked to do a gig I don't think I could handle, I always put Doddy forward, as I know he could busk it, if needed.