Just because you come from smart parents does not mean that you will be smart. If your parents are mentally challenged, that does not mean that you will be mentally challenged. If your parents are black though, you are probably going to be black.
Both of Jack Black's parents were rocket scientists. Does that mean that he is going to be a rocket scientist? No..... Duh, he is an actor, and a pretty successful one.
Just because your parents chose a path in life, does not mean that you will choose the same path. You could have the same mental capacity. You may not have the mental capacity. You may be a bumbling idiot.
Being a complete idiot is not necessarily a bad thing. We need idiots in this world. We need circus clowns. We need someone to follow the horse in the parade and clean up the poop. We need people to do these jobs. Everyone plays an important role in keeping society running smoothly.
Jack Black chose to be an actor. His parents were both rocket scientists. Both professions are equally successful and both are noble choices. We need both to make the world a better place.
Just because one chooses to not to follow in their parents footsteps, does not mean that they are mentally handicapped. It does not mean that they lack the skills to do what their parents have done. It just means that they thought those jobs were stupid.
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