Or you don't understand the concept of context?
He say "no need for whatsapp". If the context was just to refer to it as just another app that allows pple to talk to each other... then there is, in fact, nothing special about this app. Why highlight this app at all? There are already plenty of app (also free) that can do the same job. You yourself mentioned the kik messenger as a better alternative to whatsapp.
Hence the obvious interpretation (to me) would be that it is to be a
replacement for whatsapp. But what is whatsapp for? To talk to pple with whatsapp lor. It is this community that is already on whatsapp that makes it valuable.
Having wrote the above, I realised it required more thinking than you may be used to (though it was all in the background for me).... next time, I will try be clearer so that you can actually understand. There is however, a certain level, that I might not quite be able to reach... down.