Except he was also doing a phenomenal job early in his career too. It's not all smoke and mirrors or connections.
Most of us could "achieve" a whole lot if we were born the heirs to a massive fortune, with all the connections that implies.
This is a bit like attributing Wayne Gretzky's success to the fact Walter was a seasoned coach and a huge hockey fan. Obviously it helps having parents to enable your talents, but it's ignorant to pretend that rich parents alone will allow you to rise to the top.