The problem with your statement is that affirmative actions is not based solely on race, so it appears that you are attempting to or have mistakenly fallen into perpetuating an offensive myth that the main beneficiaries of it are Black/Hispanic.
The group that has benefited the most from affirmative action are White/Non-Hispanic women.
White Women and Affirmative Action https://www.racismreview.com/blog/2014/03/11/white-women-aff...
White women benefit most from affirmative action https://www.vox.com/2016/5/25/11682950/fisher-supreme-court-...
> My wife and I came to this country with a few hundred dollars...
That's a great story, how you came up, after immigrating to America from India and were able to take advantage of the opportunity. However, very important points that you have glossed over is the history of slavery, redlining, Jim Crow (and other laws), voting suppression, etc... of Black Americans who are the descendants of slaves. They (and other ethnic groups) were being shut out of opportunities, and the courts were attempting to alleviate this in some way. The original purpose of affirmative action, was to help those that were being actively and consistently discriminated against.
As a more recent immigrant, you are benefiting from laws and polices, which are the result of historical issues, court battles, and actual battles in America. Many Americans fought, died, and were jailed to get laws changed.
The context of why affirmative action was created, should not be skipped over, as if it applies simply to one person's situation and benefit. That you don't need something, is great for your situation, but that doesn't mean that's true for other ethnic groups and their situations.
"Affirmative action laws are policies instituted by the government to help level the playing field for those historically disadvantaged due to factors such as race, color, religion, sex, or national origin. These laws typically pertain to equal opportunities in employment, education, and business."
What is Affirmative Action and Why Was it Created? https://www.hg.org/legal-articles/what-is-affirmative-action...
> For my son, keeping everything else the same but simply changing his race from Asian to Black/Hispanic increases his chances...
That's gaming the system, for personal benefits, and contrary to the purposes for which affirmative action was created. That would be like a guy saying that if he writes down he's a different gender, he can now cheat his way into getting something he should not (by pretending to be female). If anything, you should arguably be against people falsifying documents or trying to present themselves as something they are not.