Video calling is a great example of something you don't need, but because you can do it, you do it. It's also impossible to refuse a video call for fear of being seen as secretive or worse when in fact you just don't care to look up somebody's nose when you talk to them. I also wonder if it's mainly nerds who care about video calling because it speaks to their otherwise rather broken social skills. "Normal people loo…
I wouldn't say that my friends/family/colleagues first instinct is video call, but we certainly use it enough when the situation is appropriate. My cousin uses FaceTime to be with his gf when they are supposed to be doing homework, my family does FaceTime/Hangouts with one another to keep in touch (spread out across midwest), I've used FaceTime and Hangouts to provide technical support remotely when I wasn't able to get to a computer, we've used it to "stream" events that certain family members weren't able to attend (e.g., weddings, etc).
Video conferencing has a lot of normal everyday applications; it's also not uncommon for people to just join up on various webcam chats just to hang out with people online, or for people matched on dating sites to start with a video chat.
I don't know how you came to some of these conclusions, but I really don't think that this is representative of most users.