Some children whom their parents are financial experts do become financial experts as their parents because they inherited it from their parents and they have good practice from them and the parents might have given them some part of their business to be managing just to gain experience.
Obviously, it's a basic thing that children learn from what they see and experience as they grow up, so if a family, which means both parents or even other adults, are in financial sectors as professionals, their children will learn about those things as they grow up, just as how a child in a doctors house will have more interest in medical stuff growing up because they see, hear, and experience those terms and things as they grow up.
This is why people always say that we should do positive and good things in front of our children because they are in a learning phase and they will learn anything that you do. How do children learn to speak? And why do children speak the same languages as their parents? It's because they hear them speak all the time, and they pick up whatever they hear and then use it.