Whilst of course my DC would benefit - since they are actually getting a good education - that's not the only/main reason.
The current Lefty attachment to the hierarchy of disadvantage is pretty harmful. It infantilizes, removes agency and creates a sense of victimhood which helps no one.
I was being facetious about "going back to everyone being judged on their results", but of course eventually we are all judged on our results. You can only bend that for so long. I'd argue that bending it following 14 years of standard state education is pretty unambitious about state education. Why do you think that 3 years of University education will get someone up to level, when 14 years of state school education didn't? Do you have so little faith in state schools, compared to University? Why not fix that?
A certain amount of taking context into consideration is healthy. I remember reading an article years ago where a girl from a Fairground background talked about her challenges getting an education, doing her assignments in the truck driving back overnight after working a fair for a week during twrm time. She was at Oxbridge reading English - and it's obvious that they should consider her interview - look at examples of her work, and discuss her ideas, consider her raw ability - far more than her exam grades. Especially for English, where missing previous education is less of a problem than other subjects. I don't think anyone would ever object that.
But making up graduations of under-priviledge and using that systematically. No, that's degrading, harmful, victim-mentality creation.
Far better to:
a) actually improve state education, so that you rarely need to consider context
b) in the very few cases it's still relevant (like the Fairground family student), use your brain to apply sensible judgement