That depends...
Can you see Van Gogh painting this while totally sober, at ease and at peace with himself?
His quality of life would have probably improved greatly, but I think his genious would have suffered.
On the other hand, there are so many artists and performers, especially in this day and age, who totally lose it because they need some serious therapy to help them allay all those demons, some of them end up in rehab and some just waste themselves (like Janis Joplin as one example).
I guess if you have what it takes, good therapy will help you be a better performer and creator.