I’ve never really understood this at all. If you have a smartphone, WhatsApp is far from the worst thing you can get on it. Does it override the internet filter or something, maybe?
I like WhatsApp a lot because I like the voice message feature and the group feature, but it is frustrating that it requires internet, so I generally limit my use of it to the groups I’m part of. You don’t need to put up a picture or a status (I haven’t changed either of mine since December) and it’s a tool, like anything else, that can be used well or ill.