I think it's only harder for the average med student who went straight from HS --> college --> med school, without ever having experienced a "real job" in the "real world".
Having done shift work at a hospital... I am 99.99% positive 3rd year med students have no idea how much they have it made, when compared to "real jobs" in the "real world." Whining about q4 call on peds rotation? Think about the nurse doing rotating shift with overnight shifts (staying up entire night, certainly no call room to relax in) every 4 days... permanently.
And it's not just the physical exhaustion. There's plenty of scut work & needless humiliation (ahhh love the hierarchy in hospitals... if you think being a med student is tough, try being support staff!!) I found it interesting that even as a MSII going into the ER, the ER doc took me seriously & explained everything to me (treated like a "junior colleague"). Whereas the nurse standing over there with the 20 yrs of experience and is on good social terms with the ER doc... still didn't get that kind of attention from the doc. So yeah. Guys. It could be a LOT worse. Trust me.
Of course, I could eat my words come 3rd year.

But... I'm going to guess that it's going to be exactly how I imagine it will be-- difficult & new, sure... but nowhere near the level of exhaustion endured in many "real jobs". And, there's no way it can be worse than my shift work days.