No one should remove from us the right to privacy in chat rooms. Otherwise, PGP might become cool again, or I bet that there will be new ways to chat without mass surveillance.
How would PGP help in the long run? If client side scanning is mandated for everything then the natural place for it to wind up is in the OS. Once your OS is scanning all the things, your privacy is finished - pretty good or otherwise.
Of course, all new hardware will have hardcoded firmware scanning the DRM’d keyboard controller.