“Look at percentages of independently educated people at Oxbridge, in Parliament, in top companies etc. it’s disproportionate and it isn’t because those people are better.”
Now factor in those who were similarly rich but chose to go to state (able to have the luxuries that many of those who went private had to forgo such as nicer holidays) perhaps hiring private tutors etc. The number of people at the top who actually come from genuinely poor backgrounds is incredibly small. The domination of those from private schools is significantly driven because they come from the group who has money. Attending private schools is not some magic network which will make your life for you (there is the odd example) but having family networks which do is much more likely too.
There was a time when private schools were a disadvantage, when we had grammars and attending private often denoted you were not good enough to attend a grammar. The abolition of the grammars caused the rise of the private dominance. However, the grammar system also had issues.
We no longer even have politicians who have any vision for what will improve education, we have vague statements, empty platitudes and trying to lay the issues at the door of the private system. You may find your dislike of private schools cathartic but it will not help kids in state schools, but it is clear that is not what this is about.
“If it didn’t advantage then people wouldn’t pay. It’s wrong that children get further because if their parents’ financial success.”
Well that is nonsense. People pay for things all the time that doesn’t create the benefit they think it does. Even in the ‘90s it was known that the actual best ‘bank for your buck’ was to get in to a good school catchment area (you could move a bit further out later), send your kid to state and to spend the money on private tutoring and extracurricular activities.
Private schools can give extra privilege (the extreme elite ones where the networks are genuinely amazing) or they can offer something for children with particular needs. However, in general it is not the benefit it is perceived to be. The private schools have an interest in giving that impression, those who oppose private schools have an interest in maintaining that impression and those who are sensible enough to use their money more wisely have an interest in keeping the competition down in good state schools by maintaining that impression.