we imagine we are seeing a lively debate

It is one of the big differences between the propaganda system of a totalitarian state and the way democratic societies go about things. Exaggerating slightly, in totalitarian countries the state decides the official line and everyone must then comply. Democratic societies operate differently. The line is never presented as such, merely implied. This involves brainwashing people who are still at liberty. Even the passionate debates in the main media stay within the bounds of commonly accepted, implicit rules, which sideline a large number of contrary views. The system of control in democratic societies is extremely effective. We do not notice the line any more than we notice the air we breathe. We sometimes even imagine we are seeing a lively debate. The system of control is much more powerful than in totalitarian systems.