As much as you might want to be, you are not always with your baby. You have obligations like work that require you to spend time away from home. While you might be great at warming your baby’s bottle under tap water for only a minute or two and checking the temperature before you give it to her, other people may not.
I know that from experience. When I was a new mother, I had several well-meaning relatives who warmed my baby’s bottles way beyond what I was comfortable with.
All these relatives were intelligent, and they certainly weren’t trying to hurt my baby, but they just didn’t realize one important fact – what doesn’t feel hot enough to an adult may be plenty hot enough for a baby.