I don't like him or Nvidia but you can't deny he was the CEO while they achieved exraordinary things. He is just very successful no matter which way you put it.
I don't just mean making money successful like polymarket etc. but he was the head of a company that created multiple huge technical achievements in past decades. He made huge bets on multiple things and the bets actually worked in the end.
And they will very likely replace him with a bunch of accountants. It is not hard to understand why someone would want to have him as a leader instead of an accountant.