There's also "historical precedence" for governments to systematically exterminate vulnerable or minority parts of their population. This doesn't mean that it

There's also "historical precedence" for governments to systematically exterminate vulnerable or minority parts of their population. This doesn't mean that it is a necessary component of a functioning government. Sanitation expectations and standards fluctuate wildly amongst different cultures and populations; that doesn't mean your ethnocentric view on sanitation makes your civilization better than other ones.