Sorry, but I take offense at this "it is all a matter of opinion and all opinions are equally valid" BS.
1) It is trivially true that if you define your measure right, you can make anyone succeed. For example black people are better at looking like black people. But we try to define "stuff" in a way that correlates with ability to do economically useful tasks. There are excellent reasons to do so.
2) You are ignoring the obvious fact that blacks do NOT get anything like equal treatment. They start with terrible schools, in neighborhoods that are aggressively targeted by police, and grow up with realistic expectations of going to jail that are amply born out by lived experiences. It takes willful blindness and stupidity to ignore that there are excellent reasons why we should expect poor black performance.
Given that the inferences on which this affirmative action position are based require willful blindness and stupidity to believe, there really is a giant logical flaw. It is most emphatically NOT plausible to say that we should expect equal performance from children whose fathers are in jail, whose schools are atrocious, whose neighborhood is dangerous, and who rightly believe that they are being unfairly targeted by police. Both how common these factors are and how important they are to actual outcomes is borne out by extensive research.
The scientific truth is that we have no data either way that can even begin to address whether one group is innately better than any other. The reason being that we have no way to separate out the impact of racism and history from innate ability. Read https://press.princeton.edu/books/hardcover/9780691190808/th... if you want a more complete accounting of that fact.
But you do not need to have an opinion on that question to identify many factors that are helping ensure that black kids don't get a fair shake at life. And it is obvious that affirmative action can be at best too little, too late, compared to the things most urgently in need of fixing.