The thing is, var, a thread about SEN pupils will attract a consensus that SEN children are not being well catered for, in terms of time, money and effort.
A thread about 'invisible middle' children will attract a consensus that these children are not being well catered for, in terms of time, money and effort.
A thread about high ability / G&T pupils (however you choose to define it - I would say both mine sit between the '1 in 100' and '1 in 1000' level academically, and one around the 1 in 1000 level for a non-academic interest) will come to a consensus that high ability children are not being well catered for, in terms of time, money and effort.
Should e.g. a group of Traveller parents post on a thread about their children, they would come to a consensus that their children are not being well catered for, in terms of time, money and effort. Equally, poor working class boys.
Achieving a consensus on a 'special interest' thread does not make something 'true' in any generalised sense IYSWIM?
As I said, the 1 in 10 level is well catered for in schools IME. 1 in 100, pretty well unless very spiky. The move to measure schools by 'progress' rather than by 'absolute results' over past years has been very useful in focusing the minds of those schools who might have been tempted to pay less attention to children wgho could easily pass the 'minimum benchmark'.
Where mainstream schools are less good are for those children in the 1 in 1000 and 1 in 10,000 categories. This is partly for the pragmatic reason that normal benchmarks - A* at GCSE or A-level - taken at normal ages are pretty much irrelevant for such children, so it is the qualifications, rather than the schools per se, that mean that no measure of such pupil's actual achievements is possible. It is only by additional benchmarks - Maths Olympiad, playing for a Premier League team at 16, performance within specialised music / performing arts contexts such as dance companies,. orchestras or international competitions - that their attainments can be measured.