If you were a professional painter and every couple of months, someone snuck into your art studio, threw out all your brushes, paint, canvas, and then dumped a huge load of requests for you to "fix" your old paintings, I'm pretty sure you'd get burned out pretty quick.
The difference is that if you were a professional painter you'd also have a second job in order to survive.
While there's a romantic vision of the starving artist, being broke is a whole different type of burnout.