>>Puts it in perspective.
2000's, I worked at a call center and then a large software company in Bangalore. Late nights, weekends and sometimes even doing consecutive days(2-3 days) at office were common. Some people I known of have clocked a record 7 days at office, sleeping in dorms for 4 hours per day. None of us complained, because merely getting a job in those situations was a blessing. Who would mind atrocious working hours, where the next option is bankruptcy.
My father was a truck driver, then a bus driver and is now a taxi driver. Most of his life he pretty much went perennially sleep deprived, tiring work driving all time. With no access to food, good sleeping conditions or even a rest room.
In fact this is pretty much how bulk of world works to make a living.
Recently, in the last 4-5 years. I had a day job and was doing my start up on the side. 10-11 hours at office and 6-9 hours of start up work at home was common. Getting barely 5 hours of sleep after a grueling day of very hard work, tense situations and routine crippling failures are common.
I would say human life is very hard. That's how it is by default.