> Why do we want to strive for an equal amount of parental leave so much? Seems like an obsession borne out of a political ideology rather than an increase in productivity.
The point of striving for equal parental leave in this instance is to even up the playing field economically for men and women. If they both have a roughly equal probability of going on parental leave and the time they'd take is roughly equal, then it makes no sense for a business to avoid hiring women of child-bearing age over men of child-having age (obviously it isn't as cut at dry, but generally there is a range of normal ages for men to dad's as well). It would of course not be perfect, but it has a chance of working at least.
Now if don't want to solve these issues (maybe you don't believe this is a problem) or if you want to look into entirely different ways of solving them (like universal basic income), then okay that's interesting but it's kind of a separate discussion.
> the FAANG can’t use parental leave as a selling point anymore.
Random aside. Why do we care if they use it as a selling point? If we want to remove that option we could also just make it national law. (Here I assume you're referring to the US since many countries have these laws already.)