The announcement did say "work on purifying your Hue", so I'm guessing there's some form of activity being prescribed - even if the success rate is deemed low. Given the way Kogami talked about it it didn't seem impossible. Personally I'd say something like <15% would be the figure. The rape victim from episode one successfully got her CC low, but I believe that was just some PTSD-type of case if we're to believe what Kogami said here.

Once seen, you can not unsee - or so the saying goes.

As for the free press, I don't know. Journalists probably enjoy as much freedom as musicians do, if not less.