Earlier quoted context omitted.
Because learning makes people less stupid in our part of the world.
They literally don't have a toilet. Are they going to conjure one if they become smart enough? I understand there's an issue of people not using them once they have one, but step one is getting a toilet, and step two is educating people enough to want to use them.
If people want toilets, they can spend some free time to dig a big pit in a nearby yard, and it will be more sanitary than their current situation. Ultimately the two go hand in hand (toilets and education) but education without toilets is a problem that solves itself, while toilets without education is doomed to fail.