It’s technically preventative, also its more a historical issue. Basically a lot of water sources were contaminated with parasites, metals, and just general nastiness which resulted in people using juice, wine, and beer as a replacement. This cultural element lost a lot of pressure towards the end of the 1800s going into the 1900s and was even an element of prohibition the argument being that water was clean alcohol was no longer needed. Which is stupid but whatever.
It’s technically preventative, also its more a historical issue. Basically a lot of water sources were contaminated with parasites, metals, and just general nastiness which resulted in people using juice, wine, and beer as a replacement. This cultural element lost a lot of pressure towards the end of the 1800s going into the 1900s and was even an element of prohibition the argument being that water was clean alcohol was no longer needed. Which is stupid but whatever.