A contibution from a mechanical (automotive) engineer that joined this forum in order to learn more ---- I once had a mechanical MSc join my team that didn't know that water circulated in the cylinder block of an engine in order to keep it cool, and that this water also went to the cab heater!!
I was astounded, but the kinder of my colleagues suggested that I was being a bit harsh.......
He climbed the ladder, and, until recently, this chap was a 'manager' in a supplier of automotive electronics. 'Nuff said?
He left because he thought he ought to be paid more and challenged the company in question with 'do more for me, or I'll leave'.
Fortunately, someone higher up in that Company had realised their error in promoting this twerp in the first place. Don't know what he's doing now.