Eh, I think some of these are circumstantial. The dating one probably applies to a very specific type of person.Yeah, some of these are gross oversimplifications; others are just wrong. Take the shaving one for instance. You can get a very close shave and not cut yourself, and have been able to for as long as straight razors have been around. The reason people cut themselves is not because they want a closer shave, they want a shave that takes less time and money. If you didn't cut yourself this time, you obviously didn't go fast enough and don't need to buy a new razor. Razor gets dull and nicks you? Don't sharpen it (that takes time), chuck it in the trash and buy a new one.
And working 90 hour weeks? That assumes that you provide more value for those 90 hours versus 40, which may not always be true. Work smarter not harder.
As for the dating one, cruel, aloof or insensitive people are by definition not the type I would want to date.