> TO say it is a human right would mean if somebody would build a hut in the desert,

You use the most idiotic interpretation you can imagine and then stating it as a fact. I'm sure that you are not doing this in bad faith, but your thinking is missing basic common sense that cripples you ability to understand society. Human right to water and sanitation (HRWS) is very reasonable right. It means that HRWS rules over other concerns in legal disputes and affects policy priorities.

This paper has real world legal cases and interpretations: https://www.un.org/waterforlifedecade/pdf/human_right_to_wat...