That's (apparently?) the minimum amount of clean water for a person to survive a single day. Water contributes to long term survival in so many other ways. You

That's (apparently?) the minimum amount of clean water for a person to survive a single day. Water contributes to long term survival in so many other ways. You need water to cook, grow food, maintain basic hygiene by washing you hands. You need water to clean a wound. You need water for sanitation. You need water for industry, so you can actually work. Even in the most basic circumstances, this is a lot more than 25oz (many, many times more). In urban circumstances it's vastly greater. And this isn't even accounting for losses, contamination, interruptions in supply. Anyway, I can see we're not going to convince each other either way. I'd encourage you to do a search around on the topic though -- there is a lot of material on the issue.