A Boring Dystopia

So if I bought a shirt made from cotton picked by slaves, that would've been perfectly fine? If I buy chocolate harvested with child labor, or blood diamonds, that's all fine?

This whole production-focused morality is entirely self-serving and has nothing at all to do with class consciousness. Many people involved in the meat industry are workers just trying to make a living. You just don't want to deal with the inconvenience of these issues yourself.

Don’t buy into the myth of supply-demand

Even if it's theoretically possible to create a system that doesn't depend on supply and demand, it is very much a thing in the world we actually live in.

and just have the difference subsidized like they currently do.

Complete nonsense. If they could just "get more subsidies" whenever they felt like it, they'd get them now, until they couldn't get anymore. Which is... where we're at. This is magical thinking.

If workers owned the farms, and decided to only produce ethically and sustainably, then people who demand more than what is available can go shove it or start hunting for themselves.

Even if one particular worker-owned farm decided to do that, it wouldn't change anything. The consumers looking for cheaper meat would simply go to the farms willing to use harmful treatment.

Why does that logic only work one way and not the other?