I can see some amount of counter-argument though. If 95% of your drinking water is clean, but then you were thirsty at 2am and you wouldn't have more clean water until someone went 5 miles up the road to the "improved source" to refill buckets, and so you drank some unclean water that was convenient and you got sick... that's still a big problem.
Convenience is a safety feature. The safe option has to also be the convenient option, or people will actively seek out unsafe but convenient options.
Usually you notice a few days before when your stock is starting to run out. If you make coffee every day, would you be surprised that you're out of coffee one morning, or would you notice the day before that you need to buy some coffee?
My understanding is that these areas are services by a single well or spigot that serves an entire small community. Like in rural (poor) India. So you don't stockpile water for days, you're fetching it daily. But then meanwhile there's also "traditional" (unclean/less clean) water sources available much closer to or in the homes.
Convenience is a safety feature. The safe option has to also be the convenient option, or people will actively seek out unsafe but convenient options.