Episode 9 should have addressed how to build a new society, not just a New New Republic, and how it would avoid the flaws of the Republic that led to the Empire and the First Order. But that’s a little bit off topic. What matters is that what comes next for the galaxy after Episode 9 - it should put an end to this particular conflict. They should have thought about how to prevent another fascist from taking power where their parents did not. Especially because the Last Jedi did address these issues, so it’s not like it’s an idea completely removed from the sequel trilogy.
I don’t want Star Wars to address anything political. It is a Space Opera where people have laser swords. It is escapist fantasy. The Prequels tried to have “ideas”, and these were just unwelcome and out of place in a popcorn blockbuster.