Yeah that does bother me about the graph. It's the digital age, you can't just lump one value to "online" and expect it to be a representation that makes any sense, did they meet on a dating app? As gamers? Facebook friends? I met my fiancee on deviantart after she liked one of my photos and messaged me to tell me so.
Society is online now, third spaces are still a thing but they're in a different form. This data is presented in a way to make you feel bad about the globalization of the Internet