At the other end of the spectrum: My wife and I made a minimal gifts pact. We each got each other minor crap we needed for around the house. It was perfect. No waste. No extravagance. Just stuff we were going to get anyway.
It sounds like Facebook tracks non-registered users as well, so everything you’re saying remains true for everyone who doesn’t have a pretty strong security posture.
If OP isn’t blocking third party cookies, FB scripts, and piholing unwanted requests, they might as well join the platform and get the tenuous benefits it provides.
Tbf Bill Murray’s character had infinite iterations. Like, there are probably a bunch where he was just lying in bed, a few where he murdered the entire town, a few where he rolled around in his own feces.