Lets say that CEOs are no more or less replaceable with AI than all the other jobs.
Throwing away all the humans to replace them with AIs is a move only an AI CEO would make, because and AI couldn't give less of a shit if something it does blows up in its face. Well, apparently real CEOs couldn't care less either. Imagining you're going to run a successful software organization (once you've hollowed out the people who both understand the work and actually give a shit about it) is insane. These people know that it will blow up, but they hope that it is only after they can rake in their bonus pay for the mounds of short term profits that result form layoffs, after which they'll float away under their golden parachutes leaving their former companies to collapse under the weight of institutionalized incompetence.