In my experience, Software Developers that can't configure/diagnose/fix hardware/networking issues are usually pretty mediocre at development as well. And vice versa for "IT" guys that can't program. Specialization is for insects.
And, like, literally everyone since Adam Smith and his pins.
Assessing how good people are at skill A by trying to determine how good they are at ever-so-slightly-related skill B is what led google and the rest of the valley down the ridiculous problem solving interview quest of the aughts. Take your manhole covers and suck on them!
Abstraction is a skill, one that’s difficult to assess in an hour-long interview, but one which allows me to say “I’m great at C# but I’ll call someone when the printer is broken” - because there are only so many hours in the day.
