On the other hand, the arguments against encryption seem to be that it cripples the Government agencies in their work against terrorists, which is a genuine concern.
There seems to be no way to address both these major concerns (that I am aware of), and hence the battle between privacy advocates and the camp against encryption in the name of national security will continue.
Banning a single service such as WhatsApp is not a solution to this problem. If someone really wants their communication to be encrypted, they can easily make it happen using the numerous tools available, and there is nothing the Government can do about it.