Why are we lumping minorities into one group when we know that many minority groups score better than average on standardized tests than the general population. Asian Americans, Nigerian Americans, Jewish people, etc all do very well.
In a world where the wealthy have ever more advantages in college admissions, standardized tests serve to level the playing field. I grew up in a very wealthy town and many kids I knew whose parents spent large sums on SAT tutors never improved their scores because they didn't have the intellectual horsepower.
Just because college administrators and others feel uncomfortable that certain groups continue to do better than others on the SAT is a horrible reason to get rid of the test.