vividly remember a student couple we knew who both stayed on the fast track and became doctors, through a very structured and rigid schedule with little time to pursue anything else. They came out the other end feeling as if they "had no idea how to be grown-up", as they put it. Granted, we all feel like that at some point, but at the time they were expected to take important decisions about other people's health and wellbeing, and felt totally out of their depth.
Honest, all my friends worked part-time or had summer jobs and some came from middle-class families. So I never had any university friends who didn't have already part-time work experience while they were still students. The sister who is a physician noticed a significant socio-economic gap between those like her who had worked part-time and same student-peers who had never worked in jobs during university. She found them more "air-headed". I do remember her giggling her head off at the impracticality of some her student-peers who were bright but clueless. I'm sure they learned ....