Experienced?

Does "experience" make a teacher effective?  Because I am "young", my abilities and drive to succeed is often questioned.  Because I am unmarried and don't have any children of my own, it's said that I "don't understand." Is this true?  Maybe because I am completely outside of the "family culture," I am able to see children clearly, without the clouded fog of having my own and thinking my children are wonderful.  How do I respond to parents who don't believe in my capability to educate their children?