Thank you Indigo.
Since Christmas I've been working been with Yr6 SA, SA+ and statemented kids, for whom getting a Level 3 was deemed a major achievement. Some are now, because of this level of targeted intervention, on track for Level 4s, especially in Maths.
Like Indigo, I have been very shocked by the level of disguised achievement and learned dependency I've encountered. The groups I've taught have actually had a lower than usual staff ratio for these kids, and they really struggled. Year 6 pupils should expect to read for themselves and to complete a task without being fed. There has clearly been a great deal of poor learning lower down the school. The sorts of subterfuge Indigo has talked about seem all too common, as do the pressures on teachers to advance kids rapidly through the curriculum before they have basic learning skills in place.
In the OP's case, I think the school may be able to make a case: the child is likely to have received routine classroom support (a prompter at least would seem helpful?) and on some tests may meet the reading criteria. Yet I find the levels from the school shocking and do think they are playing the system.
I also think the problems of high performance meaning less help at secondary are exaggerated. I've been involved with secondary school SENCOs and transition officers. We've been filling in forms, having meetings, arranging handovers as well as we can for children who are necessarily going to really struggle in a bigger school without a personal support assistant and with larger organisational demands. Those forms are very clear about support given in SATs, there is room for 'usual classwork' and all kinds of oral feedback. It may all be timewasting crap, but I don't get the sense if these kids do get a L4 they are going to be deemed able to cope on that basis alone. If they were low attainers not on the SA radar I would worry, but for the SA kids I think a lot of extra info is taken and demanded. But I'm new to the Yr6 game and may be wrong.
Even if I'm wrong, I want every one of those kids for whom it is possible to legally make the case to get the help they are legally entitled to. Preparing them for a test where even success will seem like failure (most questions beyond them) is a dispiriting nightmare. Any reassurance that can be offered before they go to secondary school would be great. Send them on their way knowing they are capable of 'average' achievement in some circumstances. Obviously I'm anxious to get the best results for my school, but I hope it runs a little deeper than that.
I can really see the OP's point here, but also the school's. If they are fiddling the criteria, screw them. But if not, why not let the kid have a fair crack at the whip for these tests?