Yes, the reason it is vulnerable IMHO, because within our mostly liberal system, there is too little support for coops in the law. We do not protect enough against people taking power from others. That's why I believe liberalism (which at least ideologically values this diversity) cannot survive without socialism.
On the other hand, even that's vulnerable. The UK used to have customer-owned banks until shareholder banks offered to buy them out. https://www.thenews.coop/85589/sector/big-bang-demutualisati...