Sure it's going to work out for some people, but I still think the obvious downside of increased working hours in total is very significant and almost never mentioned. If you raise the working day from 8 to 12 hours, just because you find some guy who likes it, maybe doesn't mean it should be accepted as a perfect idea with no downside.
In particular, my wife like working and having her personal projects. I like to spends part of my time with my children. So we both work and we both take care of the children. We are lucky to have jobs that allow this.