Not using Facebook is free and protects your privacy. What Meta claims it does and does not do with it's users data is unproveable.
https://www.statista.com/statistics/558290/number-of-whatsap...
Having a belief system never comes without sacrifice.
(I lived in a place where WhatsApp is ubiquitous, but honestly I don’t even know if I know someone who uses instagram and it’s certainly not used socially meaning with people I socialise face-to-face)
Also, significant chunk of people don’t use Instagram/Facebook for posts, but just like another messaging app. I basically have my notifications enabled for DMs, and not that interested in content scrolling.