As for your points against worker councils, why would they let themselves starve? Do you misunderstand what a Worker council even is? Do you think it’s just a group of people at the very top of a system, like an oligarchy? Why do you think the word worker is the descriptive factor?
Capitalism is right wing, Socialism is left wing.
How is there a power vacuum? How do people amass tanks in global Communism to fight the rest of the globe?
The co-ops do not exist within the same space as Capitalism. You cannot have 100% Capitalism and 100% Socialism, they are mutually exclusive.