Well there has never been an example of a democratically run company that makes good decisions so far.
It’s a classic principal agent problem. You want to take the voting power away from those with the financial stake and expect the people without a financial mistake to make good business decisions.
What is your standard for "good decisions"? Is your standard maximum profit and growth? In that case, sure. Is your standard general customer and employee satisfaction, along with stability? In that case, no.
I'd say the second criteria is infinitely more useful, and empirically it works. The most stable bank in North America is democratically run by both customers and employees, I'm a very happy customer, and I know of many happy employees.
It’s a classic principal agent problem. You want to take the voting power away from those with the financial stake and expect the people without a financial mistake to make good business decisions.