20-Year Prospect
Fortunately for you (yet unfortunate for people in general), we aren't likely to eliminate the need for therapists anytime soon. Whether physical or purely psychological, it's impossible to eliminate all possible causes of mental disorders. As long as people are around, we're going to need therapists to sort out their brains.
It's also not something that could be performed by a robot...for some reason they're not too good at empathizing with humans.
Barring a sudden ban on all art altogether, art therapy is here to stay, and is a great career to hold on to for your entire life if you're into it.