Like lots of other people I think the answers yes and no.
I work in childcare and have seen so many different parenting techniques both positive and negative and how they impact on children. Due to my studies I also know alot about child development but I don't think that is going to make me a better parent. I have learnt to be compassionate through this role as I often take on one of a councillor and have seen how some people just simply don't know how to be a parent. It is a learnt skill and if you have had no positive role models to teach you this then it's easy to fall into the trap of copying the negative parenting you have seen.I think most people try to do the best they can given what experience they have and I try to see the best in people.
In saying that I have seen children who have been abused and neglected and childcare there only positive place in the whole world so that makes not judging people difficult but I have to put that aside and go ok how can I help this child/family? I have bathed children because their parents haven't for a week and have felt angry that this child's rights have been neglected and thanked god they were in a safe place at least a couple of times a week.
Most of us learn to judge right from wrong at a young age so I think we are kind of pre programmed to do it even though we probably don't want to be seen as a judgemental person and certainly don't like being judged ourselves.