>>notion+(OP)
Im not sure why citizens of representative democracies would want to inhibit political discussion. Presumably one of the benefits of living in such a regime is the ability to participate in policy formulation through voting, political campaigns and various forms of public service. As a result, would it not be reasonable to assume that most of these individuals are very knowledgeable about a variety of aspects of public policy? Therefore the majority of political discussion would be rigorous, fact based and consider a wide variety of points of view.
Analogously it would seem that citizens of dictatorship-based regimes don’t have to worry about these details (hopefully the dictator and their lieutenants have taken care of everything) and can focus on enjoying their lives.