I get to quote Paracelcus! The dose is the poison.
Small amounts of minerals are actually "good for you", moderate quantities are neutral, large are bad. The question is, where are your values relative to recommended guidelines.
If your values are within recommended norms, the discussion is ONLY about aesthetics. And for chlorine, it will outgass, so you can just put tap water in a jug, put it on the counter or in the fridge, and after a while it will be fine.