America is a federal nation, with states having varying degrees of autonomy, and the fact that Senate seats are elected locally ensures the existence of family dynasties in politics—playing the game of family dynasties in the 21st century isn't unique to the American version; it's just that the concept of dynasties has never been phased out.
Why do so many people uphold conservatism? Because there are real interests at stake!
In modern society, many things considered 'natural' are actually the result of propaganda; central-local contradictions have never disappeared in any country, at any time.
The logic is simple—we all carry a head on our shoulders, so why should your word or decree take away our interests?
I oppose you. Are you going to kill me for it?
Come on, if you kill me, your legitimacy is gone!
Not going to kill me, are you?
Then I'm going to take a dump right in front of you! (Metaphorically)