It’s mostly propaganda from the ownership class. They bitch about it for several reasons, none of which are good:
-They need more customers to buy their shit and to continue to top quarterly figures instead of actually innovating stuff.
-They need more employees, to whom they can pay increasingly shitty wages, and to increase overall productivity.
-Christianity is in a relative state of decline and they think by shoving morally repugnant policies down our throats that those numbers will bounce up again…all to curtail the rise of “nones” in the US and ultimately to beat back the rise of Islam globally.
-Politically their policy positions are as popular as crotch rot, so they figure a birth rate increase means GQP voter increase since the states most heavily affected by the overturn of Roe are the red ones (higher abortion rates than the blue ones generally speaking).
-Yeah there’s also the race angle that’s been alluded to, as well as the safety net “concern.”
To put it another way, if there’s a compelling reason to support an increase of birth rates, I’ve yet to see it. Always trust your skepticism when you see people advocating shit like that. It absolutely stinks of grift.