I've long viewed working for Facebook (or Twitter) as like working for a cigarette company. Your product makes the world a worse place and everything would be better if your company disappeared, but hey, something's gotta pay the rent I guess?
I'm amazed that in a global lockdown, where digital communication and connection are more important than ever, that you see only negative benefit to users in Facebook.
Facebook is, by far, the worst communication platform out of any that I use. Practically every aspect of the site is designed to be as impractical and user-hostile as possible. The only reason I use Facebook (which happens increasingly less often) is because it's my only way of contacting certain people. I'd LOVE to delete my account but I can't because I still need it for random little things occasionally. I'm not their user - I'm their hostage.
And that's without even getting into any of FB's terrible practices around data collection and privacy, none of which need to be repeated here.
Yes, because Facebook's actual value is trivial to recreate apart from the network effect, and they do their worst to make the site inhospitable. It is worse to use Facebook than abandon it for almost any alternative.