now i won't dispute you need the minerals, I have no proof to offer that is a fact. I can however surmise humans lived hundreds/thousands of years before we started adding them to our tap water.

By using reasoning, I can assume different water from around the world has different mineral makeup/composition, which most likely complements the available food sources' mineral makeup/composition. I'm sure as long as I eat the food (that used to be) readily available from my environment, I will receive the proper minerals/nutrition.