Eh, I'd say it depends on some of these things. It's not just about Millennials.
1. Work is a never ending process. It can never be completed.
I guess that depends on who you work for because that is the case with some companies. My wife worked a corporate grind for 18 years and there was enough work to go on indefinitely (which is BS). Go to work for 10 hours. Go home, have a bite to eat, and then continue to work until Midnight or 1am (every freakin' day). Not to mention working on the weekend. The individual should be the judge of how much is too much. If you want to give up your life for the almighty dollar, that's up to you. I told her to get the fuck out of there for years and she finally took my advice 2 years ago. We are much happier in a new environment with a COL that is significantly less. To each their own on this one.
2. Interest of a client is important, so is your family.
Uh huh. Not sure what's wrong with that statement. It's not saying you just brush everything aside for your family, but it does imply that you should have some balance on a job. If you're missing out on everything your kids are doing for the sake of a job, again, maybe it's time to find a different job. I didn't have kids to completely miss out on everything going on in their lives and have nothing to do with their upbringing. I find it interesting anyone would have a problem with that and then the first time some kid goes awry, the first thing people say is it's their upbringing (can't have it both ways folks).
Some of the other points, had they not been so embellished (and admittedly, I'm guessing the author was just trying to be ridiculous) could have had some credibility. Some people are inefficient in their work and it causes them to put in more hours than are necessary. It doesn't mean they're a fool, but if they did a better job of delegating or changed up systems to be more streamlined, they very well may have more time for themselves.
And sorry, but exercise and your well being is important. But if you think slaving away and letting your body go to pot is the way to go into retirement, well you're kidding yourself (can't help but add that as that's my field). Not going to do you much good to have a shitload of money and then be in a walker for your retirement and not to reap the benefits of that hard work.