So why are you telling the story with supermarkets and meat producers framed as actors? Looks like it's the consumers who have collectively made this decision, and companies have just been following their wishes.

Yes indeed, consumers have collectively made the decision from the choices given to them by the market (you need at least two sides for most market outcomes, since transactions generally have two parties). My point is that not all consumers are necessarily better off from the collective decision.

The fact that you only see two choices at the stabilized market right now doesn't mean that these were the only two choices present when the market transformed.

It's impossible for everyone to be happy when you're making the collective decision.