I would argue that the vast majority of users don't use WhatsApp for privacy. In the UK at least, it's just the app everyone has and it works. I've actively tried to move friends over to signal, to limited success, but honestly it can be escaped how encryption is not it's killer IP.
Other drugs are cheaper, and readily available.
https://northjerseyrecovery.com/why-gen-z-is-drinking-less-but-using-more-drugs/