It can't be concern for the impact on your own children's education. After all, this whole derail where you all jumped in to deny that Oxbridge discriminate against private school students came about as we were discussing whether state sixth forms would be over-subscribed this year.
That would be a reasonable thing for the anti-private brigade to be concerned about. It will affect your children too, not only ours.
There were several informative, detailed posts of explanation for why this is a perfect storm for state sixth forms (natural transition point, private being less beneficial given 6th form focus on academics, better chance of getting preferred state sixth form and less disruptive cohort there, chance to save fees and avoid anti-private discrimination in Unis) and also why over-subscription may not be obvious yet.
But instead of engaging with the actual concern being posted about - whether September will be a shit-storm for state sixth forms - you all jumped in to be bitchy about private school kids. Again. Determined to say that changing sector at sixth form is about 'getting an advantage' rather than about avoiding evidenced discrimination, as well as all the other reasons.
All you care about is to deny the discrimination against private students, which is frankly a laughable position. All the numbers back me up - both the admissions numbers for kids who switch which I posted and also Cambridge's own analysis on outcomes.
I think @fairmindedmaiden is spot on. Spiteful and bigoted. You can't bear the idea of our kids getting an education that improves their lives. Even when it's at our own expense, whilst you take the £8k per year subsidy for yours, and spend all that money which we're spending on education on different advantages for your kids. You feel threatened in some way by our kids having anything yours don't. Fucking weird, to be honest.