Sure, they probably should implement it to be able to make it private, but then again, I do not trust Meta and I do not think you should trust it either, so if you get sent to jail for using it, you should probably be wary of it either way.

There are many alternatives to WhatsApp, you may want to try them. Briar, Ricochet Refresh, Session, Matrix (Element), Jabber (with OMEMO and whatnot), among many others.