To be honest, I don't know what was in the psychiatric reports, just that it definitely came out in cross-examination. I've always thought that the prosecution was too willing to accept Sutcliffe's own self-serving version of events, and that it was inadequate to commission psychiatric evaluations that were based solely on what he said. That there was an aim to prevent details of the case from becoming public to protect the reputation of West Yorkshire Police is just my speculation.
I accept what you say about the judge being intellectually honest in his decision and take the point that he made the decision in question without having heard the evidence in full. I do think his stance was subsequently justified, but I'm not unbiased here. I've always been fascinated by this case, and it's always been a hobbyhorse of mine that Sutcliffe tried to portray himself as a moral crusader when in fact IMO he's a vicious, tawdry and utterly repellent dysfunctional sex killer.
I don't know if anyone on here heard it, but there was a recording doing the rounds several years ago of him talking about his attack on Tracey Browne. It was utterly nauseating and typifies my objection to the way he sought to portray himself down the years.