Despite all of its privacy concerns, one can't really get rid of it if everyone around is using it as the default communication mode, unless you're a social outcast. The thing with communication apps is that they aren't a personal choice.
It is possible without beeing a social outcast. Element, Signal, Telegram and Threema cover most of my contacts. If there really is someone with only Whatsapp, I write a SMS.
In my experience everyone has at least one alternative to Whatsapp.