You can adjust and revise and you can twist the end product. All these people do help determine the success of any company. The problem occurs when government demands that the stakeholders be given formal power. Where it has been tried, continental Europe, for example, taxpayers have wound up subsidizing inefficient industries. Consumers pay higher prices for poor products and abysmal services.
Job growth stops.
Comparatively few executives, judged by what they actually do, are in there to maximize profits. For security, yes. For status and power, yes. For comfort, yes. A corporation which really made an all-out effort to maximize profits might well decide it could do without them.