It is great if it works this way for you, but every group had its own dynamics. Personally my group of friends primarily talks via Messenger, that's where all the planning for things takes place. We have one friend who isn't on Facebook and he unintentionally gets left out of things. He isn't cut out of our lives, but ultimately he pays a penalty for not being on Facebook
I've been Facebook free for several years now. It feels great, and I didn't have to cut anyone out of my life to do it (who I wasn't otherwise already communicating with). Much less noice, more productive, both in my life and in my relationships.