The logic on this statement doesn't really check out, as if this were the case it would be impossible to retain CEOs, they would all leave after a month. Yet somehow companies do so ...
Or, CEOs don't have the same set of options engineers have, or, CEOs are drawn from a pool with different preferences than engineers have, or...
Well, lots of other reasons your dismissal of the claim about engineers based on CEO behavior is unconvincing.
Learn everything.
I have a goal, it is to be better than average at every "skill".
Plus, yes, there are other goals than "not working".