But businesses aren't states. If a business makes the wrong decisions, it can fail and be replaced. It is too dangerous for states to go through failure and replacement, but as you note, it's also bad for there to be no mechanism to punish of bad decisions. The goal of a republic is to bring the fail-and-be-replaced mechanism to state governance, but in a controlled way. But this is less efficient, so if it's ok (with respect to society at large) for an organization to fail, it makes sense to just use that mechanism directly.

There's definitely a loophole with "too big to fail" companies. Maybe those should be run more democratically. I'm not sure, I've never worked for a company that couldn't just fail if it persistently made the wrong call.