You can definitely look at it in a few ways. Many of us know one or two guys who are content to do just that. And they are comfortable with maybe having less or whatever. A friend of mine is still bartending and surfing all the time. That's what he wants. We only get one of these lives so go make yourself happy.
But, if you are going to get into your 30s and 40s and complain about your school loans or not having enough for a down payment on a house or the cost of whatever, I don't have time for your bitching if you also wanted 32 hour work weeks. Life is about trade offs. It's not supposed to be easy all the time. I knew 20+ years down the road, I would want to post about advanced analytics on a message board. And defend un-defendable coaches. So, I basically took my 20s/early 30s and worked my nuts off. And dealt with some bosses that literally would email me where I was at 9pm at night if I wasn't at my desk or in a meeting even though those sons of bitches made me get there for 8am kick off meetings.
I am totally fine with sanding down the edges of that. I don't romanticize about it. It sucked and there is a better way to do it. There is a middle ground. If you work your ass off and have trouble with student debt or down payments, let's have that conversation as a country. But, man, the attitude in that letter is something else. Because those same people will be complaining about whatever they face next.