There are plenty of engineers who are not suited for leadership positions, and inability to detach from the technical details and focus on the bigger picture is certainly something you'd want to watch out for. No one said these jobs are easy, or that the right people are easy to find.

But it seems just as likely that an accountant as CEO would be unable to detach from irrelevant details about accounting systems, cost savings, tax classifications, or whatever it is that low-level accountants worry about.