Hoasis, I agree with you. I wouldn't like to blame families because in the end, with few exceptions, they tried to do the very best for their kids, but it's widely proven that our first relations have a great impact in both how we see ourselves and how we see the outside. That is even moré determining in individuals who already have a genétic predisposition to be sensitive.

Some families are wrong when they are overprotective, some others are wrong when they don't provide the necessary care of the kid's needs, both physiological and psychological needs. As the estoics said the best is in the middle.
Another point, but out of topic, is if our society help with the right conditions to help parents with their children's care.

Not mention these kids who are mistreated or abused. Such a thing can mark someone for life.

But, I would like to stress on the aspect that parents and the rest of relatives are human beings, with their doubts, their flaws, their problems...so, a good step to give for an avoidant, or any other person is sane this injury by compassion and understanding.