Art should be done foremost because it's a passion for the artist. If you give up art just because you can no longer sell it, because you're being out competed by computer generated furry porn, then the world hasn't really lost anything of value.
With what time and money? The statue of David and the Sistine Chapel ceiling would not have come to be from hobbyists. There are precious few culturally relevant works of art that lacked both a patron and a sales motive.