They groomed him to be a morally good person and even if he was not allowed to show his powers off, he was taught to care for others before himself and not fight back because he would hurt the others. His parents (adoptive) were supportive of he truly was and never treated him like an outsider, he was shown what it is to truly love and he was in the presence of stable and moral social relations. All of this is in truth what shaped Clark into being the person he turned out to be.
This is in a way an analogy for what I mentioned earlier about good people acting morally if lead through pure channels of communications. This is an area of the myth that can be better understood through film because it is more relatable to people. For example, when we read newspapers or watch the news and we see that a person has done some horrible crime some part of us wonders about the family background of that person, simply because it is a known fact that someone’s social environment has a great hand in shaping a