We're discussing two different issues here. Affirmative Action can create the legal structure that requires implementation of policies and practices allowing for access to opportunities. Whether or not that access is equal frequently is debatable, as it is difficult to define which circumstances might impact a person's ability to perform as a student, for example - should some students be allowed admission to a college program with a different GPA than others because of a difference in ethnic background?
Affirmative Action can not change the opinions and biases in peoples' hearts and heads. Only time, exposure, and experience with diversity can bring about the changes in thought patterns that will some day, God willing, make Affirmative Action unneeded because we will all truly and fully accept each other as being equal.