I think your argument is extremely porous and caters a bit too much to self-indulgent artistic cliches.

One doesn't have to be an artist to recognize when an artistic expression has run its course or has gone off the rails. In fact, i would counter-argue that the audience is better suited to recognize this than the artist is.

I'm happy when creative people are able to feed their families through their work, but that doesn't necessarily mean that the work they're producing is top-notch.

TV *is* produced for an audience and the television audience DOES routinely decide when a show is to end. By not watching it. That's why shows get cancelled. Because the audience decides that they're not feeling them (anymore).

Good for them, though... let them cook.