Eg - I grew up in a poor, 50% immigrant area in Brooklyn. The Russian and Asian immigrant kids had better outcomes than their American peers despite fewer resources because their parents kicked their ass and failure / slacking wasn't an option.
Whether perfect meritocracy exists or not isn't the point, the point is to maximize your own input to increase your own chances.
In contrast I see a lot of modern approach to problem solving is to lower expectations to make things more equal for some. But I expect that this lowering (eg: no need for SATs, no more selective magnet schools, easier admissions by race, etc) will have a negative effect, the opposite of the immigrant mentality described above.
I see a similar trend with lowering enforcement of some laws because the enforcement appears racist based on who's doing the crime. By making it "okay" you are perversely worsening those people's lives in the long run.
It's a little sad because I am sure all of this comes from a good place but it doesn't truly elevate people.