There are quite a few people who don't use Facebook. One person, I know, is a college professor who enjoys teaching as an outlet for his creativity. One could say he doesn't really need Facebook. Also he's skeptical of it's corporate nature.
I still see Facebook as a common person's outlet for writing and photography.
This makes me think of a segment of a radio talk show I remember from the mid 1990s. Someone called the show suggesting the host get a website. Websites were new, back then.
The host was skeptical. He kept saying, "why would I need a website?"
The caller persisted talking about how he could post articles, archives and so forth.
The host eventually started thundering like the Wizard of Oz. He said, "My voice is heard on over 100 radio stations coast to coast." "It blankets America just fine, thank you." "I don't need no web what?"
Forward to now, I just looked up that host. I don't think he's got a show anymore, but his rants are available on a website.
In that discussion I had with the professor, the problem of junk mail came up. He admits that email is almost unusable now due to so much clutter of junk mail. I find the same problem with telephones. It's why I don't answer the phone unless people leave a message. One good thing about Facebook, it filters out a lot of the bulk stuff so it tends to be the more interesting responses from real people. Not flooded with a bunch of appeals for money from various organizations. Real people are more apt to value my thinking, rather than just my checkbook.
I do admit that Facebook would probably be better if run by a nonprofit.