When people use the term, it is obviously not a reference to just "knowing things" but rather 1) the distinct socialization one gets in academia that leaves one rather divorced from the real world (and I say that as an academic), and 2) hyperspecialization to the point one loses the big picture, a problem in education today.
I definitely agree existing in a particular silo gives you a narrow view of the world, but I've never understood the idea that the silo of academia is somehow worse or less representative of the broader world than small town living or being in the military or any of the other silos many people exist in. The real world almost by definition is made up of the combination of all the things people do and the environments in which they exist.
Obviously being a truck driver is different than being a physics professor. But I'm not sure there is much of a coherent argument supporting the idea that the former exists in the real world while the latter does not.
People use the term to manage their cognitive dissonance. They do not want to put the work in to become educated, and do not want to admit that this puts them at distinct disadvantage in many ways that matter.
> distinct socialization one gets in academia that leaves one rather divorced from the real world
It is absurd claim. Academia is part of real world. It is not an isolated island cut off from everything else.
It is no more divorced from real world then any other group of people. No more divorced then rural farmer are divorced from it, businessmen are divorced from it, sports fans are divorced from it. They are all having limits of understanding other groups.
Tech workers as likely more divorced from average person even.
Yes, this was, obviously, my intended usage.
Not the wet lettuce straw man usage posited by the other comment.
I knew one or two profs like that when I was studying, but the vast majority of people in academia are just regular people with families and interests outside of academia. It's kinda disheartening to see the anti-intellectual bent this discussion has taken.