This is a strange position. On average every person should raise a family for the continuation of the humankind. Therefore this should affect everyone equally.

On average it affects all women equally because women are physically affected by the specifics of having babies. However, some men just choose to sacrifice their family life instead of lowering their pay rate one iota.

So you should see an effect on family income but divergences in gendered income.

> Sabbaticals also hurt careers.

I'm sure sabbaticals (and even vacations) hurt careers in some scenarios, at some companies. I was responding to the notion that this was "retirement", and unique to the woman.

> You don't get a raise and a bonus for being away 1 year when you are 25-30.

People take parental leave for weeks (6-8 is typical), not a year.

Nobody argues that there is no cost associated with the choice to have kids.