Never disbelieve the power and momentum of stupid. It's been going on for centuries. That's why those "IRS" scammers keep robocalling USA phones...They keep doing it, because they make money from the stupid USA people who actually send them money, those who are too stupid to realize that the IRS does not sue people, and threaten them over the phone that they will go to jail if they do not send them their credit card information. The stupidification of the world started sometime in the early 1990s. There was a definite transition from smarter to dumber at some point in the middle of that decade. It has been accelerating from the early 2000s on.
Doesn't matter how he got in. The bottom line is he's in Yale. That's all it matters nowadays. That's why whose parents bribe to try to get their kids into those schools. It's sad. Really sad.