Let me backtrack for a bit. The woman who wrote the blog post went on vacation for a few days to somewhere with soft water. In her words, she “fell in love” with her hair during that weekend. Then she returned home to hard water and her hair went back to its normal ways.
So she asked if soft water really makes that big a difference with your hair.
With soft water, your hair and skin both are softer. Your hair will also be shinier. You will also use less shampoo, which means you save money.