Best manager I ever worked for worked his way up
Fairly rapidly admittedly seeing as "daddy" owned the company, but he was made to do every job in the shop before he was allowed control. it was a steel fab shop so he had done everything from sweeping the floor to welding to writing computer systems to run the office.
He sat his desk right in the middle of the drawing office, open to all, and genuinely seemed to know pretty much everything that was going on.
Every other job I've had, managers have been either too ignorant of the actual job, or promoted because they were good programmers/techies etc. but suddenly, in power they discovered they had no man management skills.