Oh the Ai art generator has no "soul" and it's soy and reddit? This precious art form (illustrating things that other people pay you to, a medium dominated almost entirely by furries, porn, and furry porn) is being destroyed by the evil AI? I'm sorry that the democratization of art creation is so upsetting to you. I've brought dozens of ideas to life by typing words into a prompt and I didn't have to pay someone $300 to do so.
They're literally stating that the relationship between artists and capital is being fundamentally altered as a result of the introduction of automation which we've seen in countless sectors already where the benefits are not shared amongst the working class but are instead siphoned off by the rich. To state that paint brushes are somehow equivalent to the relationship of workers and capital and that we must throw shit at walls instead is incredibly bad faith.
Your industrial agriculture example also ignores this fact that the problem is not inherently the technology, but the fact that the wealthy are taking any benefit that is gained while workers are left to starve.
I've already stated that holding the tech in common is important elsewhere. There are in fact open source versions of this tech, and everyone should use it.