Dont you think they are part of the same environmental (some might even say genetic) attribute that you may have inherited?
Certainly think it applies to me & my dad (who was a medic too incidentally)
What are you referring to by "they"?
At any rate, I inherited many habits, manners, attitudes and predilections from my father but I don't think we share the same way of thinking. He doesn't seem to have an appetite or enthusiasm for philosophical discussions.