Seems easy to explain, high schoolers were not in school from 2020-2022 in most areas, so they were two or three years behind in everything when they got to college.
Instead of admitting the captain of the ping-pong team (who can't count past 21 - or past ten without pulling off his boots), maybe admit any one of the students who... Did not have the extracurricular pedigree, but actually applied themselves and passed Math 12?
Surely, there's more than a few hundred of the latter in California.