Truth be told there are plenty of those folks as well.
In European universities you aren't necessarily required to do outside work, so there are plenty that do the path, student, Msc student, PhD student, Professor, department chair, retirement.
In fact, I had a couple of occasions where good professors told me to just taste the professional world between getting the degree, and trying to pursue further academic life.
My second attempt at it, while at CERN, kind of did it for me.
So I do understand where the stereotype comes from.
In European universities you aren't necessarily required to do outside work, so there are plenty that do the path, student, Msc student, PhD student, Professor, department chair, retirement.
In fact, I had a couple of occasions where good professors told me to just taste the professional world between getting the degree, and trying to pursue further academic life.
My second attempt at it, while at CERN, kind of did it for me.
So I do understand where the stereotype comes from.