If the CEO has to work for the shareholders benefit even outside the work then what about the rank-and-file? Should not all the Amazon employees be forced to shop only at amazon.com and WFM? Should not all Microsoft employees use only Microsoft software? Should all Google employees use Pixel phones and Netflix employees fired for subscribing to competitor streaming services or buying movie tickets?
I think your expectations of loyalty might be a bit exaggerated. A job is a job. Whether as a CEO or as a warehouse picker, it's not one's life.