Earlier quoted context omitted.
And the villain quote along the lines of “if we are all superheroes then no one is a superhero”.
It's an accessible entrance into things like entropy, or to think about subjects like eugenics (if we're remove genetic diversity there will be no racism) or wrongthink (if nobody has these bad ideas we would all live in harmony). DISCLAIMER: this is not an invitation to start debating these subjects, these are just crudely picked examples.
I'm sure most are aware but your description about eugenics is a bit off. It seems like you are putting a positive slant on it or suggesting thats the goal, whether intentional or not. Eugenics is about denying a class of humans (however you classify that class) from the ability to reproduce. This is highly unethical and given our tendency to classify on race, usually associated with racist agendas (such as the Nazis). I had to look up Wrongthink but it seems to be a term the Alt-Right is introducing... possible a play on thoughtcrime and newspeak (both Orwell) to defend their controversial opinions [0].
0: https://www.thetimes.co.uk/article/alt-right-has-a-word-for-...