I think AR/VR definitely turns off a lot of people, me included. Further it is seen as anti-social and unnecessary to many. I think the lackluster sales prove the “not inevitable” point.

I don't necessarily disagree with the crux of your point. But I suspect the lackluster sales also had something to do with the $3,500 price tag. Meta has sold sold over 20x as many Oculus units.

Why single out the Apple Vision Pro and not the Meta Quest?

Don't know, but, several times now, a product category was not universal until Apple "invented" it. Haha, only serious.