That line gets blurred with intercontinental mass-communication that ultimately is beyond the use of the average citizen and is more frequently utilized to nefarious ends.
I reject the premise of your argument: secure communication is not more frequently used for nefarious purposes than non-nefarious purposes.
But even if I accepted that premise, I would still reject your argument. The underlying principle of your argument is misanthropy: humans are inherently evil. They will always choose evil, and therefore, they must never have an ability to effectively dissent from totalitarian control.
The dangers posed just by the French government greatly exceed the dangers posed by every single person who ever has or ever will “nefariously communicate” over every communications platform that has ever been or ever will be invented.