Possibly irrelevant to this discussion (you decide): the level of stupidity in any human undertaking is almost always a) higher than you'd think, and b) pretty constant across all cross-sections of humanity.

Source Carlo M. Cipolla, Professor of Economics at UC Berkeley: https://advanced.jhu.edu/wp-content/uploads/2013/07/The-Basi...

Despite widespread attempts by humans to eradicate it, it exists everywhere; ignoring race/class/education/gender/orientation/profession or any other sub-division you can think of. You'll find roughly the same amount of stupidity in a gaggle of university professors as you will in a humdrum of railway attendants (I made up those collective terms, in case it wasn't obvious).