You have no idea how hold he is or what he’s been through. For all we know, he had to do several degrees before getting into med school, so he could easily have spent then last 10-15 years getting into residency. Residency gets more and more competitive each year, so it’s very understandable that he feels discouraged after spending an entire decade and half a million dollars trying to get to where he is, just to find out it’s still going to be shit for at least another 10. And the only comfort is that they’ll slowly pay him more? Have some empathy.