Then nobody would create entertainment. What a horrible world you envision.
A brief thought experiment.
You're a DM. You run a game for friends. I will assume you also don't run your game using only adventure paths or modules, you make your own adventure scenarios. Maybe your own campaign. You run a game people find entertaining, and you charge your players fair market value for your entertainment and they gladly pay you for it!
No?
You do it for... Free? Why? Isn't your labor worth it? Isn't the time you invest in making your own material worth as much as any writer?!
Maybe it's because you derive income from another source so that your labor as a dungeon master isn't worth monetization. Perhaps if more people were free of the shackles of worrying about food and shelter, they could make art and entertainment for non-monetary reasons. Artists would paint, directors would make movies, writers would write and they could do it for expression, not material gain.
Maybe such a world doesn't have someone who can make Avenger's Endgame, but ask yourself if that's really all that bad? It also doesn't have someone who can destroy an entire swath of game designers in one bad 9000 page legal document.
Anyway it's beyond the scope of this thread. I just want to point out that art and entertainment does not need a profit motive to be made, and the abolishment of such profit motive would not necessarily be the end of art.