Why is Nicholas Cage pretending to be a hunky action hero with a bad southern accent? What has been driving John Malkovich to be a criminal? Why is Ving Rhames a black separatist who thinks these white fools will be good for him?
And why, WHY is Steve Buscemi in this movie at all? You can watch this and blank out the parts he is in it and the movie doesn't change much in either plot, comedy, etc.
The answer is because THIS IS AMERICA, DAMIT. Everyone is playing the best possible version of their character for no other reason that because they showed up in Jerry Bruckheimer's rolodex and felt thrilled to be here. Do we learn anything? No. Is anyone going to be inspired by this? No. Is the world a better place for this movie? Well, yes. I don't want to live in a world without Con Air. The joy of movie making is on full display in this film, and if that isn't something that makes the world better then nothing else will for you.