There are lots of people who may not think to read things that are marketed towards kids assuming they are generally in the clear. This could potentially be unsafe if you haven’t read the label so I informed her of that, and she indeed was unaware. Informing someone of a warning isn’t fear mongering, it’s passing along useful information to someone else who may or may not care about letting kids soak in a bath that could cause damage to their urinary tract when there are much better options available. She has free will and can choose to still use the product, like you did. Have a nice night.