It's not going to be banned. The legislation provides the government with leverage to allow it to compel these companies to make their apps open to government surveillance when appropriate.
Presumably no-one would deny that the police or security services should be able to obtain a telephone intercept warrant, if someone is a criminal or terrorist, for the purposes of gathering intelligence. So why should other forms of communication be exempt? Making certain apps a surveillance free zone is just an invitation for terrorists to turn to using those apps