Pretty obvious when you think about it. My Father was an engineer, although a different one than I am. As a child you pick things up when you grow. The fact that I had a computer at home back 3 decades ago, automatically meant I already had an upper hand and a better understanding of how computers work than most of my classmates who only got to see a computer almost a decade later for an hour every week in school. Also having an engineer as a father meant you had these weird books full of knowledge that you could browse through and get immersed in, for free, since I was basically a toddler. He could help me with homework, even if it was to explain integral calculus, which I could not comprehend before. Not saying that I couldn't choose any other profession, just that I naturally had the upper hand and years of experience in certain things even before going to college. I'm sure its the same for pretty much every profession as long as parents stay involved with their kids.