I think the reason is getting more and more obvious with every passing day.
His father and mother are professors of Law (and Business) at Stanford. (The mother is also one of two founders of Mind The Gap.) His aunt is a dean of Columbia University's School of Public Health.
https://showbizcorner.com/sam-bankman-fried-parents
His brother was running a lobby group called Guarding Against Pandemics. FTX's head of policy and regulatory strategy was a Commodity Futures Trading Commission commissioner under Obama.
https://www.cnbc.com/2022/11/14/former-ftx-ceo-sam-bankman-f...
And that's not the end of it all, there are many more interesting connections.