I wonder if this was a deliberate act rather than a fault. Trim a few of the edge cases, save a bit of money. There seems a bit of doubt about cancer testing for people at the top of the range and beyond, so they could, at a pinch, moralise about that. And where should the bottom edge be? 59? 61? You could console yourself abstractly about that. And money is saved so they can use that to save more lives immediately. I find it entirely plausible that something like that could happen in a huge bureaucracy, especially one under prolonged pressure from above to drive down costs. If only it wasn't for them meddling kids. Perhaps I'm becoming too cynical.