Not using Facebook is fine for direct conversations. It really isn't an option in larger groups.
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Here's a great example. I go on a canoe weekend with a bunch of old friend each year. Some years it has an upwards of 100 people attending. I know about 10 to 20 people, including the hosts, very well. The rest are either acquaintances, second connections, or friends/family of the hosts.
Everything gets done via a Facebook event because it's the easiest way for the hosts to communicate with a group of 100 people. A few people "refuse" to use Facebook so all communication with them about the event has to be done on a secondary channel. Sometimes those people accidentally get left out of important notices. It's nothing malicious, just the hosts having jobs and busy lives and forget about a few odd ones out.
I don't use Facebook. When I want to hang out with friends, I call or text them on my mobile phone. If I want to invite people to an event, I call or text them on my mobile phone. Or if we're hanging out I'll say something like "we should go to [event] next week!"
I haven't used Facebook for years and it has not obstructed my social life in any way.
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Here's a great example. I go on a canoe weekend with a bunch of old friend each year. Some years it has an upwards of 100 people attending. I know about 10 to 20 people, including the hosts, very well. The rest are either acquaintances, second connections, or friends/family of the hosts.
Everything gets done via a Facebook event because it's the easiest way for the hosts to communicate with a group of 100 people. A few people "refuse" to use Facebook so all communication with them about the event has to be done on a secondary channel. Sometimes those people accidentally get left out of important notices. It's nothing malicious, just the hosts having jobs and busy lives and forget about a few odd ones out.