This is probably pretty accurate. When I was heavy into composing music, I learned just enough guitar to do what I wanted to do. I never really memorized the basic chords, just because I never directly used them.
I teach guitar for a good portion of my living and that's actually a much more SP-typical response. It's common for any type that isn't really that interested in learning the ins and outs of music, though.
If you could be anything you want, I bet you'd be disappointed--am I right?