As someone who writes, sculpts and draws for a living, I'd be concerned if T put a brake on that. But I always take time to articulate my thoughts and feelings to myself every day, either in tutorial videos, in my head, etc. I've found it useful and therapeutic to do this during periods of living abroad when I don't get to articulate in my native language much, and the creativity is a good outlet also... but it all helps to maintain the thought processes and creativity flow when you don't have very inspiring surroundings, or people around you who are imaginative or even talkative.
I've been doing it for a while in response to being quite isolated, it seems to come natural. And also since I heard a few years back that challenging yourself to learn new skills and to articulate can help to keep degenerative brain diseases at bay... use it or lose it, I guess. I'm always using it, and nearly always in some kind of education... so I hope that will keep any effects of T on the thought processes in check.