I hear you. I refuse to use WhatsApp and only have FB and IG accounts for business requirements (which I would happily jettison)--and I don't have their apps on my phone, logging in via the business console only and only via my desktop (with lots of privacy walls built in--but still).

I feel what you're saying about the exclusion that comes with telling people they can't find you on one of these apps--particularly WhatsApp here in Europe. I tell people they can find me on Skype or on Signal, and some are fine with that, and others say they'll just e-mail me. It can be a bit of a downer, but at the same time, I figure it separates wheat from chaff, and we all have a lot of noise in our lives, anyway. If someone doesn't value a connection with me enough to contact me via anything but WhatsApp, even if it's a tad less convenient for them to do so, then it probably it perfectly fine that we don't really take up contact.