Because by getting off Facebook, you end up missing a lot of what you are used to. If your life and your friend's life is not on it, this won't affect you. But if you and your social network has let Facebook grow as a dependency, you can't easily get out of it. The only way it could work is if you manage to migrate your entire social circle off it and it won't happen.
By getting off Facebook, you simply make yourself hard to reach and it will make your casual relationships rot and die. When my friends create an event, they click "add all members of 'amazing friend group' to event" and that's it.
Nobody is going to then track down the one person who decided to leave the group for a casual event like "5-7 beer this Friday". Even for big events, you may end up being let out simply because you have made yourself harder to reach.
Sure, by leaving Facebook I would still be able to see my 2-3 closest friends and partner but that's it. Nobody in this day and age is going to send an email to me asking to come to a group event. Hell, I don't even know the email addresses of my closest friends, let alone our extended friend group. I can't even imagine how I would organize a 20+ Christmas event without it.
A christmas party for 20 people? Do you not have anyone's phone number? Or address?
People will ask if you are going to the party and people tweet about a party or they will ig a photo about it. If you have no point of contact outside of facebookfriendgroup you are on the edge of losing connection to that group. It will start happening when people start moving over to snapchat one by one, joining new circles you are not part of, having smaller parties you didn't know about. If those casual friends are important you really need to strengthen those bonds outside of facebook. One day there will be a new smaller group.. will you make the cut?
Everyone is on Facebook but only some people are on the other networks. Fragmentation is not much of an issue or danger.[1]
Sure, if I'm not looking at Facebook and a party happens without me I'll receive some snaps about it. However at that point it's already too late. Snapchat is for sharing slices of life. Nobody organize big events via Snapchat.
Twitter and Instagram are for interacting with strangers. I can't see how posting a photo of a private event to my Instagram followers would help the situation. All it will do is end up with people unfollowing me for posting content that is not what they follow me for. It's not somewhere to interact with friends. Twitter is even worst. Am I to do? Look at #party daily in hope to stumble on a real life friend using it? On both those networks, I follow brands and hobbies. Not close friends.
Everyone is on Facebook and leaving it would simply make my social life harder. I've tried it many time and I've also seen it happen. Whenever someone isn't on Facebook, you don't see them. It keeps happening. "Where is Bob? Did we forget to invite Bob tonight? Does anyone of you has his phone number? I can't seem to find him on Messenger." Phone numbers and addresses are on a need to know basis. If I never needed someone's, I don't have it. Since everyone uses Messenger to communicate, I don't have a lot of them.
[1] Perhaps that's a French Canadian thing, over here Facebook has around 70% of the population while Twitter has only around 10%. Even if you go Canada wide, Facebook has 71%, Twitter 27%, Instagram 20% and Snapchat 9%.
By getting off Facebook, you simply make yourself hard to reach and it will make your casual relationships rot and die. When my friends create an event, they click "add all members of 'amazing friend group' to event" and that's it.
Nobody is going to then track down the one person who decided to leave the group for a casual event like "5-7 beer this Friday". Even for big events, you may end up being let out simply because you have made yourself harder to reach.
Sure, by leaving Facebook I would still be able to see my 2-3 closest friends and partner but that's it. Nobody in this day and age is going to send an email to me asking to come to a group event. Hell, I don't even know the email addresses of my closest friends, let alone our extended friend group. I can't even imagine how I would organize a 20+ Christmas event without it.