Does anyone else communicate with EVERYBODY on Facebook Messenger? My parents, my coworkers, my girlfriend, even my drug dealer - I don't really have anyone's phone number. And I don't think I'm unique in that way. I don't have the Facebook app on my phone, for around 2 years now I haven't posted or viewed my feed. I do concede I'm still addicted to other aspects of my phone, it's just Facebook that I always found especially distasteful. However I consider Messenger as an unavoidable necessity for my generation.
Replace "Messenger" with "Whatsapp", and you have about half the globe with the same problem. Literally all my communication since like 2015 has gone through WhatsApp for me and everyone I know, replacing texts swiftly. And since Facebook bought WhatsApp, it's effectively also Messenger. Potato potato - effectively, there's no escape from Facebooks grasp. Even if you don't have an account, Facebook profiles you.
I think it very often looks that way because lookalike audiences have gotten really good. The real issue is that many, many websites have some analytics connection to Facebook, so ads have a lot of data to target you with.