Personally, I don't see why breeding specifically should be subsidized above and beyond other aspirations. Loads of people are stuck in jobs that aren't perfect for them without the ability to spend their time on the things they'd rather do without sacrificing some aspect of their position, whether that be raising a family, taking a trip, creating art, whatever. The reality is that there is a legitimate opportunity cost between career and basically any other aspiration.
Personally, I think that if we can, as a society, we should try to allow people to do the things they really want to do. I'm a supporter of universal basic income. I think that if people's basic needs are taken care of they'll generally apply themselves to more worthwhile things than they would to earn a paycheck, because the weight of the fear of failure is removed.
I can see how applying this idea to women specifically would be good in terms of allowing women more flexibility in the workplace, something they show a strong preference for, but where does that leave everyone else? What about women who want to be artists, rather than mothers? Or men who want to climb Mt Everest? Conversely, what about those people who do work 60 hours a week every week for 40 years or whatever? Shouldn't they get a significant leg up over the rest of us who, quite rationally, can't be bothered with that sort of insane grind?
I'm just not sure why having children is more important than other aspirations or, for that matter, why child-rearing ought to be specific to women. At the same time I do see that more women seem to choose to spend more of their time on their children than men, and I really don't see a problem with that.
Don't we have maternity leave in most of the US at this point anyway? To what point do we further extend accommodations? How, again, are we measuring success? Are we measuring success in a way that distinguishes choice from compulsion or that muddies the two and leaves us to guess what's what?
That, to me, is really what makes all the difference. Do we know what's going on with people, or are we filtering vague information through an ideological lens to get a specific answer that we're trained to search for? We should always try to eliminate bias, I'd say.