Capitalism is a system that lets anyone succeed. So perhaps there aren’t that many workers cöoperatives because most working class individuals are simply unfit for leadership positions.
I mean you can’t really expect someone whose job is to wait tables to know how to properly run a restaurant. It takes someone who understands systems and most people don’t.
But you know what. Even the poor have fridges and cars in the USA. Hardly could say the same about North Korea.