It’s not black or white. Or on and off

I don’t expect all human reproduction to just stop. But cutting down on the human population by either having no children or only one, would substantially reduce the load humans place on the planet and mayne even increase quality of life. Not to mention that it would improve the chances of other species to thrive.

There is absolutely no scenario in which everyone stops having children. If everyone who could be convinced not to have children is convinced, there will still be plenty of human beings.