Most big CEOs are definitely not in charge of multiple companies. You hear about Musk and Bezos because they’re all over the news, but they’re all over the news because they’re not normal CEOs.
It’s well known that Musk’s relationship to his companies is primarily one of ownership and delegation. Bezos hasn’t been in charge of Amazon for a long time but people conveniently forget that at every opportunity.
> it really doesn't seem like it can be that hard of a job.
It’s funny how often I hear this about AI replacing jobs, with one exception: Everyone who repeats it is highly confident that AI can replace other jobs but once you get to the work they do they’ll stop and explain why it’s actually much harder than you think.