That it's not 100%? There is no material reason to have children, it's only a burden that opens you to constant normalized harassment from society.

It's sorta like starting a business in Europe.

I don't see any of this changing until a world government stops government and corporate labor extraction at the expense of pair bonding. That's the conservative take, the moderate one is that the era of humans is totally over and we will either be entirely replaced by robots or transhumanists. Since society already treats people like cogs I doubt there will be much real resistance to the genocide of all humans.