Earlier quoted context omitted.
It's not that easy in many parts of the world. Whatsapp became the standard communication not only with your friends, but also businesses. You talk to your bank manager via whatsapp and your doctor etc. No Whatsapp, no talk.
That's very interesting, how often do you have text conversations with your doctor?
My dermatologist also offers a whatsapp address where you can talk to her assisstant.
My GP communicates via iMessage.