I don't need to work at public companies to buy their equity. I work in earlier stages to gain access to pre-growth equity.
I would certainly not want to work at a non-worker-owned cooperative. That's not an incentive alignment for me as a worker, and it's a hierarchy placed above workers. Customer-owned coops are only meant to be good for the customer, it’s standard hierarchical wage labor bs for workers.
Not that worker-owned ones are able to avoid politics though - all social relations have varying degrees of success and conflict.