Frumpyinthefrost, I agree with what you're saying.
I was just using the EBacc as a sort of rough indication of how many children are succeeding on a more academic route. I certainly don't think that is the only way to judge a child, school or an educational system.
Apparently, the non-selective schools in a selective area are skewed towards a less academically able intake. That's not a big surprise. But some supposedly comprehensive schools in supposedly all-comprehensive parts of the country are equally skewed.
What matters is that every child, whatever school they are at, should get the appropriate exam results for their ability and interests. You don't want a bright eighteen year old who realises they have a passion for some scientific or technical job and suddenly finds they can't get on the course because they don't have the right Science GCSEs, not because they were mucking around in school but because the school did not offer those exams. Or the kid who suddenly finds they need that A or B at English or Maths which the school didn't put them in for.
But I know kids in both those situations. One of our local schools stopped offering all three Sciences at GCSE because they just didn't have enough able kids to do so. (They have now closed down.) Others put kids into BTEC courses without being straightforward about the effect this will have on their A level choices. In both cases parents are choosing a comprehensive school at Year 6 for their kids and subsequently finding out that they are actually at something more like a secondary modern, without this ever having been made clear and of course, without ever failing the 11+, or indeed failing anything else.
Perhaps the problem is that there isn't a proper definition of what makes a school comprehensive - its just a school that isn't a grammar. Presumably, it would be possible, though draconian and unpopular, to enforce school admissions that created more similar ability ranges at all schools. Perhaps there should be clear rules about what a school has to offer academically to be called a comprehensive.
Sorry - longer post than I intended!