Re: Stupidity plus arrogance
(same AC here)
I agree that Oxford/Cambridge (I can't bring myself to type "Oxbridge" without wincing) have an over-representation amongst private-school kids, for whom "exam training" is available, and the quality of the degree very often does not correlate to the loftiness of the institution; I'm sure my degree from A N Other Russell-group university was every bit as well taught as that I might have got if I had chosen to go to Cambridge instead. To be honest, the main things that put me off Oxford and Cambridge were the collegiate system, which felt anachronistic 30 years ago, and the pompousness. By that point, I'd had more than enough of being around the overprivileged.
When I went to university, which was in the mid '90s, the entry process for many universities wasn't based only on exam results; there was a process where you would take a day off school, visit the institution, they would look at your predicted grades, give you an interview and then would give you your entrance criteria. This was useful for both the student and the institution, because the institutions could nominally filter out the worst of bullshitters, and the students could work out whether they liked the place or not. On this basis, I managed to eliminate one from my shortlist, because I'd taken the day off school and, instead of visiting had "done a bunk", yet despite me not turning up for the interview, they still gave me a (pretty low) offer anyway.
Oxford and Cambridge were notorious for having much more formal, and harder, entrance criteria, not only in exam results, but also in interviews. I'm sure this is still the case, and I'm sure this also favours those from a more privileged or moneyed background, who could be imbued with the skills required to do well in interviews via things like private coaching. I don't know if it still the case, but they also had different exam requirements at the time, ISTR Oxford would want you to sit their own entrance exam, and for the degree I did, Cambridge would want you to have taken the "special" paper at A-level, colloquially known as the "S-level", which on top of the A-grade, could give you a "merit" or "distinction"; I can be reasonably sure I would have been accepted into Cambridge, since I took these extra papers in two subjects, gaining "merit" in one, and "distinction" in the other. My reasons for doing so were personal ones, and nothing to do with university entrance though.
As for private schools; well... Firstly, it has to be said, there are private schools, and then there are private schools. On the one hand, you have places like Harrow and Eton, which are breeding grounds for the parasitic class, and then you have the much larger number of small, local private schools, with probably a handful in each town and city. I was sent to one of these, a local boys' school, and I have to say, it's not really an experience I would recommend. Apart from the deeply unnatural environment of a single-sex space, which socially puts children at a real disadvantage, these places are stuffed with people where money really does take precedence over talent. The children might well gain a much better "education" in terms of academic subjects and opportunities (I doubt the local comprehensive gave anyone the option to take Classics as a GCSE), but as an introduction to the "real world" they probably offer less. As you say, the whole system is kept going by the "old boys' networks," and really the system is pretty well set up to give an advantage to those whose parents had an advantage and little more than that. I'd like to see an end to private education in this country, and these places opened up to all, alongside a massive boost of money into state schools. I'm a firm believer that everyone should get the same opportunities, and if they squander them, that's on them.