Because for some reason the anti WhatsApp crowd fails to understand that the majority of the people using WhatsApp would lose any social life if they just uninstalled. It's always the same. "Just don't use WhatsApp!". I'd literally not communicate with any of my family. I'd be the one weirdo that doesn't use WhatsApp and that then maybe gets invited to things if somebody remembers to call me or write me a text message.