Someone probably said the same thing to Van Gogh during his life.
People never appreciated him but at least Van Gogh could say he’s doing something groundbreaking and new.
Whereas the artist in question here, I can’t imagine they’ve ever legitimately thought that of their own art, it’s just not that groundbreaking or good.
Maybe they just realise that they’re unemployable elsewhere so they may as well carry on
The world was lucky to have Van Gogh, but Van Gogh was very unlucky to have this world.