I vehemently disagree with your disagreement, and don't think you really understand my position.
First off, people enjoy movies for any number of reasons and I don't think you can say any of them are wrong, objectively speaking. As such, there is no such thing as a 'good' movie, objectively. It depends on the subject and the context. Otherwise, how do you place value on any criticism? If a movie looks cheap, is incomprehensible, characters are stupid....well, what suggests that it's bad for a movie to be any of those things? Context. Without context, things just exist without any value, good or bad. It's foolish to try to erase it, because it is how we make sense of anything.
Second, there's nothing to suggest that partial understanding can't be enjoyed. As far as I can tell, no one truly fully understands anything in any field. No historian will tell you that they know the complete history of anything, or scientist that says there are no more discoveries to be made in their field, etc. I apply the same to art. There is never a single movie that is truly, fully understood from every possible perspective. No study is ever complete. And that answer's your aging question as well. Merely because a movie can't be fully understood does not mean it can't be enjoyed.
Lastly, I was mostly just remarking how Fury Road's direct sequel will be intrisically tied to it, as they are the same franchise. The zeitgeist thing (and considering there has never been a gender equal society nor is one looking like it's about to happen any time soon, in this case, zeitgeist means all of recorded human history) was just to emphasize how much I think things affect each other, but I think most would agree that direct sequels have connections and influence on their immediate predecessors. Our personal philosophical differences on the nature of art notwithstanding, I don't see how if Furiosa starts acting out of character or the world building is damaged somehow, that would not reflect poorly on Fury Road. FR will always be what it is, but a sequel is just something that keeps the story going, so now the story of Furiosa and Max, assuming we only get 1 sequel and it's shit, is going to be great for the first half, and bad for the last half, then you have a broken story. The part that was good is always going to be good, but it's intrinsically died to a rotting corpse, and that will hurt it.