Yes, I have the agency to lose touch with people I care about, because it's not practical for me to convince them all to use a different medium. It is the FB moat. It's real.
So people who don't use facebook aren't in touch with people they care about? There is no moat, only an FB blindfold. It's just a product. If it's not serving you well, drop it. Better ones will arrive faster than we blink.
That's just so black and white. I could muster an effort and get some of what I get from FB via other angles, sure. And yes, there are some relatives that aren't on FB, but for me, that's the exception, not the rule.
But it is just so naive to assume I wouldn't miss out on notable pictures and news of people I love by opting out. Facebook does have some value. We're not just purely idiots. We get the trade-off. Hard opting out would have real downsides for me.
I decided to do this a long time ago. I use the phone the normal way and other real social settings to keep up with my friends. I'm at my stress limit already since long so this wasn't such a hard decision. My well beeing and my familys goes before anything else. Avoid a burnout, it's very damaging to your world when it hits you.