Yeh I guess that is also true.. I think though, that if you are in a creative rut and you can't find a way out of it.. then it's best to try something different.. like music theory. I don't sit there and use music theory simultaneously as I am playing but it helps lend a hand when I am feeling a bit of repetitiveness in my structure or melody or rhythm etc..

Most of the stuff I play I could already play years ago.. but I hadn't made all the connections between things. Like.. understanding the relationship between the chords in a diatonic chord progression really helped... also things like the fact that when I am playing predominantly in Eminor, rather than being in the key of G Major.. I am actually in the key of Eminor.. the key signature on the musical staff is identical.. yet the fact that I centring around the Eminor chord makes a big difference to everything else.. the harmonic structure as they like to call it.

Anyway.. music theory is not a magical wand.. it just can help if nothing else works.