I know it's an oft-recited thing in the last decade or so, but I don't really understand it. It's true that in markets with lots of value to provide someone will win, and probably make lots of money, but to do so they would have to out-compete all the other people. That is extremely difficult, and calling it luck just seems a bit silly. People who got rich through building businesses aren't like lottery winners or heirs of fortunes. Why pretend they are, and what's behind that mindset?

Because it is demonstrably true for many people that luck or family influence or money played a factor.

They may have had to compete with other people in the same advantages in the same business - which may not be very many.

There is an overlap between people who build businesses and heirs of fortunes. Far more people increase an existing fortune than become rich from scratch.