One of their fathers was a successful slumlord, and the other owned an emerald mine in South Africa. Those provide a one-time advantage (which in Trump's case would have been more profitable if he had socked it away in an index fund.) How do they establish 'generational talent' for being POTUS or building rockets and cars?

It will be interesting to see if any of Elon's offspring choose to follow in his footsteps. Probably not the transgender child he disowned, or the one whose name has to be written with Unicode characters, but that leaves something like 20 others to vie for the throne.