I don't use any service related to Meta because I dislike the company/owner.
I still don't get the huge success of WhatsApp. Doesn't owning an Android device imply that you have a Google account and so the access to the many communication apps Google already offer (I suppose some of them are even already installed)? Or, at least, that was the scenario at the beginning of the Android era.
Granted, Google illogically and confusingly replaced/killed its own services many times in the past which didn't help its diffusion. Still, what do the users do? They install a third party app/service, mostly ignoring what they already have under the nose.
The saddest part is that those weirdos like me aren't immune to Meta tentacles even without touching their apps/services. My personal informations are surely saved in friends' contact books, which are accessible by Meta and thus Meta knows about me...