My guess would be it's because it's an experience (most of us) have in common in years full of first times. It's also an experience that took as least as much space in our life than work now does. It's also a place where we had to deal authority and groups. So whenever you make any point about education, if the point you are making seems to negate/go against the grain of my own experience, I will probably tell you :)

(Venting is a need that everyone has when under pressure not sure it has anything to do with our education structures)