You know, our city water comes right out of the river - they run it thru charcaol, add chlorine, and a bit of flouride.
Been drinking it all my life, why stop now?
Mine comes out of my well.
I once saw a broken water main. It was half full of the nastiest looking gunk you’ve ever seen.
Go take a plastic bottle fill it up and sit it on the shelf for a year. See what its like then.
Even the emergency water rations have a expiration date on them. And they are sterile water in a mylar based container.
But yer right, don’t let reality or science change your mind. Keep in mind that when you get sick from bad water you will probably die.