You are assuming causation here. You can show correlation, but not causation. Again, university X may produce higher graduation rates than university Y for a particular factor or group of people, but there are many variables affecting this. Ex. selection process for admission may vary by demographic group. Therefore, if it's more difficult to get accepted to uconn as an asian male than any other group, then asian males will likely have the best grades on average. But that doesn't mean it's easier for asian males to succeed at uconn or that uconn is doing a better job of educating them. It just means they are likely more intelligent on average because there was a more selective process for them to get admitted. On the flip side, if being a certain race and gender helps a person get into school, then the academic success of that group will be below average due to being less intelligent on average. Once SAT scores and highschool academic record are factored in, then all demographic groups have essentially the same drop out rates, graduation rates, academic success etc. But since demographics are taken into account for admissions at many schools, then you see a spread of results that is not equal between groups of different races, genders, first generation etc. Uconn and other schools spend millions of dollars per year on salaries of people trying to figure out why students of different backgrounds vary in success, but almost all of the differences in outcomes are due to the fact that the schools discriminate in admissions and therefore different groups of students are not the same on average and will experience different dropout rates and academic success etc. It's politically incorrect to say this so people dont talk about it and the university keeps pumping money into trying to figure out a solution to a problem they could fix by simply blindly looking at things like high school academic success instead of demographic information. They can do what they want in admissions, but don't spend millions of dollars on administrator's salaries pretending to try to find a solution to a problem that they created and already know how to fix.
Without taking into account many factors, then weighting a decision about where to attend school based on something very specific like the average success of people who are like me in a particular way is probably not wise and should not be weighted in US news and world report to rank a school. Focusing on reputation of the school, which companies recruit from the school, which grad schools people get accepted to from the school etc are going to be better indicators of which school to attend IMO.