I think part of the problem is the class of people who can pull off a coop aren't hungry enough to maintain a coop; if you have the buy-in (class portability, marketable skills etc) if things get tough even momentarily people can and do just bail. But market and legal forces literally work against you. Push and pull. People who are hungry enough get undermined and put back in their place.
Look at the shit the basque had/have to push through. Narrow circumstance there.