Camel:
Engineers are very good at engineering. But generally they dont make very good managers. But this is a very big generalisation and apologies to those handful of engineers who are good managers.
And your citation please? Do you mean professional engineers or LAME's? My Forty years of management experience have led me to believe it is fatal to try and manage something you have no understanding of at the coal face.
It is the "scientific management" crowd - anyone can manage anything if they have management training believers who are responsible for the under performance of a lot of corporations and institutions.
To put that another way, it used to be said in management circles that you should never order someone to do something that you cannot do yourself.