Ignorance of the masses; Very few people realize when they get an HD Voice call that it's because they're on the same network.

It's frankly surprising that people make regular calls anymore because of the inter-network lack of HD voice; you'd think everybody would make hangouts or FaceTime calls.

Of course, the other likelihood from ignorance is that few people have good hearing.

The problem with "everybody would make hangouts or FaceTime calls" is that not everybody has unlimited data. Of course it depends how much you use your phone for calling while off wifi and how much data you pay for, but it's definitely not a factor worth ignoring.

Probably moreso because LTE might be the first type of network with enough reliability.

But, my best example is for doing interview phone screens. (where two people are at fixed positions with high speed networks)

I know a lot of people who make < 1 phone call per day and yet spend hours taking photos. Agree it's a shame.

Casting wide aspersions, I feel like it's because you can't get likes/upvotes for phone calls. But, Snapchat shows that ephemeralness is valued, so maybe it's something else behind the war on direct personal real communication.

Voice calls are pretty much the least used feature in smartphones for me. Certainly way, waaay below taking photos.