If HYPSM reject, say, 65% of students w/ perfect GPAs and SAT/ACT scores, that means 35% get in. That's good odds, no?

I am suggesting that picking a number from a random web site and/or youtube clip and running away with it is not helpful in any way. As I said repeatedly on this thread, statistics is not that simple, you have to control for other variables and nobody has the data to do it.