Humans are social animals. The need to connect is a primal drive. Even our most basic needs, such as food and safety, have always been accomplished by humans as a group. We weren’t equipped to conquer the world with fangs and claws, so we got a prefrontal cortex that gave us cooperation and attachment.
There are a lot of myths about social media that reflect two fundamental things. The first is the fear associated with new technologies. The second is the implicit assumption that the old way of doing things is the "right" way and the news ways are morally superior. It's easy to see how both of those points of view happen. It's also pretty clear that these types of cognitive bias don't form a very good basis for evaluating the new tools.
Myth 1: Social media are destroying our social skills and replacing offline relationships
Myth 2: You have to be on all social networks—they’re basically all the same
Myth 3: You don’t have to be on social media at all to have a full and happy life.
Myth 4 : People don’t tell the truth on social media
Myth 5: You can’t control your social media presence
Myth 6: Online relationships aren’t “real”
Myth 7 : Social media don’t do any good