Some people are probably addicted to facebook, but for the vast majority I don't think your comparison is very good. In almost all cases you can switch to something different than facebook.
For this reason I'm basically stuck with Facebook, but I've unfollowed most of my friends, so this reduces the burden to some extent.
Because if ones friends forget to invite them to events because they are not on FB, then it’s time to find new friends.
Even though the shallow connections take up time that could be spent forging more meaningful connections with those around them, not everyone is self-confident enough to go cold-turkey.
Of course, many people don't want to change their habits and I think there is no need to push too hard. However, I convinced a friend of mine to try Gajim on PC and to my surprise he sticked with it and installed the Conversations App a few months later on his smartphone.
Of course, the network effect of FB is very real. So overall this anecdote doesn't really change anything. But I think it is import to remind ourselves every once in a while that there are people out there who are willing to change their habits. And some of these people, in turn, influence other people. It's unlikely that you start a trend but I think we should keep trying.