This implies that governments didn’t already have this ability, which appears to be largely untrue? To my understanding, many countries already had emergency messaging systems, and mobile integrations are just a way of modernizing them.

(It seems exceedingly good that the government can warn every civilian about natural disasters, etc.)

These aren't from Google or Apple, they're from the wireless providers: https://en.wikipedia.org/wiki/Cell_Broadcast

If you say so. In the meantime I’ll continue to appreciate the occasional tornado warning.