From a historical perspective, it’s stranger that swearing isn’t normal for some people; it seems to be a universal feature of human languages throughout history and around the world.
The exact swear / taboo words vary of course, but in general it does seem like just about every culture ever has had and used swear words.
I think it’s interesting is that so many autocracies keep up the pretense of democratic and rules-based governance; even North Korea has elections. Same with political trials like you see in so many authoritarian regimes, from modern Russia or China to Nazi Germany – it’s like autocrats need to be able to pretend to themselves that the system they run is fair and just, and that they’re not just tyrants who govern with impunity and enforce rules arbitrarily.
What I don’t get is why? Why bother when it’s immediately obvious to everyone that it’s all a sham? Why not drop the pretense, which everybody knows is just a pretense?