Somewhere along the line, we started being able to do for ourselves. As we learned how to do things for ourselves we became less dependent on others to do them for us. The more we learned how to do, the more independent we became. Then we started questioning what we had learned. For most of us, that questioning was met with a lot of resistance.
People usually have a lot invested in being right.
For them to be questioned lead to the possibility that they might be wrong. Remember, they were raised the same way you were. They learned their values the same way. They learned their morals the same way. They learned right and wrong the same way.