I have always been taught that greatness is in work (karma), and not in birth (janma), and honestly I have seen it practiced.
A "lower" caste High School teacher gets visibly much more respect in our society than a random priest from "higher" caste.
This is like saying America's racial quotas (or former ones) put you in a 'bucket'. Caste is essentially race / genetics. You are not bucketed, it is simply a reality of your ancestry. Of course you can't change it.. you cannot change your genetics. This is a ridiculous goal post.
Not to say it isn’t a problem. But race is still a problem elsewhere too.
Yet, we also outlawed slavery and Jim Crow laws in the US and yet my local prison in the Deep South is filled with 90%+ Black people. We outlawed redlining and yet the modern credit score system does an excellent job of continuing the purpose of preventing Black people from getting loans and leveraging their wealth.
All this to say, my understanding is the sentiment and infrastructure are still in place regarding India's caste system.