“Helps” is a funny term. Probably a) “has to as a last line of defense” or b) “can’t reasonably ask anyone else because it’s after hours etc” or c) it’s high conscientiousness.

This probably won’t fly over very well on hacker news but the academic literature on CEOs and their work ethic, even down to physiological changes in their blood/saliva related to cortisol, suggests they work hard in general and make many sacrifices.