This. I've concluded the same, observing my own interaction patterns. I use very little social media (would've ditched Facebook if not for Messenger, and Instagram if not for my wife liking to post "stories"). I do, however, have a huge HN problem. But it's not a consumption problem. I feel a compulsion to comment (like here, now). If I don't do it - e.g. because I can't find anything I feel like responding to - I quickly get tired and it's easy to close all those HN tabs.
I've tried breaks from HN. Each time, I somehow ended up on Reddit. Again, not consuming, but engaging in discussions on various subreddits that tend to be more about conversation than links. The few times I tried to stop myself from that, I quickly ended up on Mastodon, posting "tweet storms" and creating more interesting conversations.
So at least in my case, it's definitely about connection. Pure consumption has its draw, but I can kick that somewhat easily. But those kinds of conversation - which, for reasons I'm not sure of, have no equivalent in meat space - have me in an iron grip.