There use to be a generation of skilled leather workers who passed on their skills from their blood line. If today one spends lets say 20 years in just programming C, C++ and other programming language then you can certainly conclude with great certainty that he is an expert. Now imagine I pass my skills to my children and their children and it continues in my family for millenia then my offspring in future who have continued this legacy of passing down their forefather's skills to their children will be the best programmers in the world (assuming that computer programming is still a thing) because What I acquired in 20 years, I will take atleast less than half of that time to transfer my skills to my children. What they acquire in their lifetime they will be able to transfer that knowledge to their children within a decade or less. Since the knowledge transfer is exponential here the resulting family line will be one of the if not the most expert in programming anything.
This is abt me, myself n dat lil mad-man in me