He is really proud of buildings he was working on and that he was able to build things with his own hands.
Even though I have an engineering degree and work in totally different environment I think that something I took from him is that I am really happy with the systems I have built and ability to create things on my own.
I did it with keyboard while he did it with hammer.
So I don't think it is "cartels" it is still a lot of what you experience in your childhood. If your parent is a dentist he will talk about that and you won't have problem to understand things in that area, maybe you will visit his practice and be able to play with the tools even. Well it still is some kind of upper-hand but not every child can have the same exposure to dentistry and I am fine with that.