They understand what it means to soldier on despite being tired. They don't understand how much they've taken for granted all that support and feedback that was able to let them cope with the stress, and that now they're on their own.
I expect in a couple years it will get old, but people are waiting to settle down well into their 30s these days to extend these years of pure adult independence for as long as they can.
My ex-wife felt like she was on top of the world until she was burnt out and it developed into full fledged depression at age 27. I’m not saying everyone will end up like her, everyone won’t develop lung cancer from smoking either.
Are you saying that doctors entering their first residency have no idea it's going to be a long 2-4 years? When a friend of mine gradated law school and landed her choice job, her comment was 'the next 2 years are going to suck, but then I'll be set'. Years later she was right.
We are not talking about starting any random job, but those jobs that everyone knows have an initial hazing type of culture. The large majority of jobs are not like this, but big law and finance are and those graduates going into those industries are fully aware.
Fresh graduates absolutely do not know what they are getting into when they start their first job.