He truly suffered for his art the way almost nobody else did - and just look at what he created for the world by doing so.
Even in the institute he looked outwards, away from his pain, and created great works for us.
If you asked Vincent now (however you interpret what that may mean) and ask him about his "suffering" and if he would have wanted to be "cured" I have no doubt he would look at what he created and say "hell no!"
And perhaps his only true wish would be, if he could go back, would be to do it all again.