Serious question: what would be the disadvantages or repercussions of banning for-profit private/public corporations and replacing them with mutuals and worker

Serious question: what would be the disadvantages or repercussions of banning for-profit private/public corporations and replacing them with mutuals and worker cooperatives? I’m not looking for corporatist or capitalist apologia. I’m looking for honest, good faith arguments against cooperatives and not arguments in favor of capitalism.