> Cooperative guarantee that profit is owned by the people who create it.
I don't think all the value created by workers is realized as profit immediately. Workers can create value which only shows up in contributions to revenue much later. If you and your coworkers figured out the design and manufacturing process for a new product and the product only goes to market after you retired, you helped create the profits even if they arrive after you left the firm.
If the coop structure as you narrowly define it doesn't allow workers to receive the profits of their labor in industries that have a long time to market or R&D cycle, then isn't that a recipe for those high value industries to be inaccessible to coops?
Try to imagine an alternate history where Nvidia was a coop. A lot of the value behind its current high revenue was done many years ago. Cuda was released in 2007. I don't know how much of the hardware has inherited from older designs. If only current workers benefit from the current high sales, has the organization really ensured that "profit is owned by the people who create it"? That seems implausible.