I totally agree with your first point. Most parents aren't modeling reading. Everyone complains about kids being hooked on their phones, but that's not surprising when the adults are so hooked too. Parents can say "reading is good" all they want, but if they're not actually modeling it then it doesn't do much good.

I'm going to argue on the latter point, though. A lot of popular social media now is image and video based rather than text-based. Text that is there tends to be pretty short. I doubt the average teen today is reading much on their smartphone.