People have been drinking hard water for a long time. Seeing as the whole population of a place like Copenhagen hasn't keeled over or shown any particular healt

People have been drinking hard water for a long time. Seeing as the whole population of a place like Copenhagen hasn't keeled over or shown any particular health issues in general I'm going to come down on the side of it's fine for health but annoying for appliances. I've got a filter for tea water for taste preference. The level's you're going to seem a bit extreme, are they a waste of your time and money?