Yes, the scores at the top are way too bunched. A perfect score should indicate generational genius, not the 100th smartest kid your year in California.
You really don't see a problem with that? Our best students should not be "admitted to at least one UC campus". They should have their pick of the UCs and should be getting generous scholarships to entice them. There is absolutely loads of bunching near the top the distribution which makes it impossible for actually-top students to differentiate themselves.