There are more ways to learn about a topic than just experience. A person who has studied child development/parenting/whatever the discipline has knowledge and should not be dismissed out of hand.Ever take parenting advice from a childless person?
Yes, persons who have “been there, done that” have a certain unique perspective. But you can’t dismiss persons who don’t have those same experiences.
Back to your friend…would she accept advice on pregnancy and childbirth from a childless OB/GYN?