I guess on this thread we have parents of all sorts of DC who go to all sorts of schools. What they have in common is interested and supportive parents otherwise we wouldn't be so invested and on this thread. That already gives them an advantage. Obviously private schools also give an advantage, otherwise why would you send them there when education is otherwise free?
I don't really like the fact that the playing field isn't level but that's true for all sorts of reasons, but this thread is generally pretty supportive. It needs to be supportive of those who feel their DC don't have many advantages and struggle with that, as much as those who have plainer sailing through life, whether that's because of circumstances, finances, health or SEN etc.
Sometimes I think people on the thread can be a bit dismissive/critical of those who have an alternative viewpoint. If it's truly supportive it needs to accept that we don't all have the same views but we do try to come together to find some common ground.
I think we can all agree that we hope our DC will reach their potential and will be fairly rewarded for their efforts, whether that's getting their critical 4 in maths and English, getting on to their chosen course next year from entry level at college to selective sixth form, or getting that elusive 9!