I could, I guess, go back to running mailing lists or manual methods of keeping track of contact details and sending things directly to people.
But short of that there's no easier way for me to keep up with friends who are distributed around the planet.
If the UX sucks, it means it takes more time and energy to do the same thing, it means that I will not be doing the same thing, I will end up sending to less people or less information. Which means that facebook effectively allows new types of communication which would otherwise not even exist.
It's about the connection itself, it's about the energy and attention one puts into the relationship, not whether one allows oneself to use facebook for it or not.
This assumption is based on what?
Pretending Facebook is useless is like pretending GM doesn't make cars. Sure, maybe you don't like GM cars but they fill a genuine need for a lot of people.
https://www.cnn.com/2018/11/26/business/gm-cars-dropping-pro...