@AustinS,
The question is how does this work in practice?
There is no reason why workers cannot also be owners. But managing a business would still require accounting, marketing, supply procurement, and general administration. So there would still need to be professional specialists who spend their time managing.
The question arises, who gets to own a particular company? The employees of that company? Companies are not equal. Some are much bigger and have more money, equipment, influence and power to begin with. Since the employees own the company they are now part of an owner class; but the owners of General Motors are the new aristocrats compared to the new owners of a two man shoe repair shop. How much power to dictate terms would the employee owners of mines, timberlands, transportation and telecommunications companies have? What about the employee owners of banks who supply the lifeblood of finance to the rest?
If these resources are placed in common public ownership, they still have to be managed full time on behalf of everyone. That means bureaucrats. Who places them in authority? What are the limits of their powers? Who can remove them, and how, if their performance is deemed unsatisfactory?
How are resources managed to insure that supply goes where it can best be used? If everyone can just order as much supplies for their business as they like and get unlimited loans on demand, how can finite resources be distributed without shortages and waste in those places whose orders come later? Who gets to decide if a project deserves a loan and resources?
A system where everyone spends their time voting in order to micromanage everything is a system with no time for anything else. It is also a system run by the ignorant on the basis of wishful thinking and misunderstanding.