alt Hacker News> And fathers who wish to divorce assume that the mothers of their children will be fine raising children alone with the support of their family, the state, and their salaries.
This makes the false assumption that men don't care about their children. Society and the courts tend to agree with it, but the vast majority of divorced men I know complain about how little they get to see their children, combined with how they are seen as only a paycheck and not as a parent. Things are slowly changing, men are more likely to get custody, and joint custody does happen - but there is still a lot of the "men are not able to raise kids" attitude around.
Statistically, fathers who ask the courts for joint custody almost always receive it. Occam's Razor dictates these men you know most likely prefer to complain about their divorce rather than to do the arduous work of parenting. They can also renegotiate this circumstance if they feel like it.