Having known a number of CEOs over the years, they arent the ones waking up for those 3am calls unless it's a business shattering literally apocalyptic event.

They honestly shouldn't be the ones taking emergency calls either since most of the time they'll be in the way.

There are plenty of non CEO jobs with similar requirements

I've known and work with extremely powerful CEOs.

This couldn't be further from the truth.

They hire people to wake up at 3am for them.

Sounds like your average IT infrastructure job.