It made sense originally to break the cultural pattern of discrimination. It's done that, while there are still racists out there they don't have the power to keep people down that they used to.
Yet we continue to use it to solve a problem that isn't caused by discrimination and thus can't be cured by efforts against discrimination.
It was there and implemented for a specific reason. That reason wasn't nonsensical to begin with.
The person you replied to did not say if the reason was nonsensical or if the policy implemented to address the reason was nonsense.