Colleges that produce Nobel, Fields and Turing winners

No.13542668 ViewReplyOriginalReport
Can you guys explain how this happens?
https://infoproc.blogspot.com/2015/09/colleges-ranked-by-nobel-fields-turing.html
As an example look at this
>Caltech undergraduate students 1k, Nobel winners 24
>UT Austin undergraduate students 40k, Nobel winners 2

This is ridiculous, by per capita production Caltech is outperforming UT Austin 480 times. I picked UT Austin because I know it is a good university. I worked with their graduate and they are on average quite good. If you look at course offerings they have incredible depth and breadth in every stem area, they have unlimited resources for top students and superstar professors. Surely, among so many students they have more genius students than Caltech, yet they fail to produce great scientists. Why this happens?