Unfortunately "genetic regression to the mean" is a real biological phenomenom

Even if you pick out the outlier, a very, very well-mannered, intelligent person, your children are going to get genes that are closer to the average of the population / race, than the genetic-lottery-winning outlier

That is why you ALWAYS have to consider populations, relatives, "race" and other things, in addition to the "individual"

The same goes with every single feature or trait. For example, professional athletes and olympians do not produce only olympians. That is because of genetic regression to the mean. The individual traits of a professional athlete might be caused by in a large part by genes, but are not nearly as much heretidary. The top individuals are just a product of genetic lottery. For example, Jordan's kids are not good, at all, in basketball. Gretzky's kids didn't succeed in hockey.