Problem is: there are a billion stupid people who can’t figure out how to get clean water for themselves. And they are reproducing anyway.
Well they will either figure it out or succumb to water borne parasites.
Nature has a way of weeding out the weak.
A billion stupid people who only know how to hump.
And one billion of the highly-educated ones are still too stupid to read signs that say “Please do not spit your chewing gum into the urinal”.