Interesting. The issue seems to be primarily with diagnosis of very small areas of Gleason 6 and some argue it should not be described as 'cancer' as it doesn't have the properties but by giving it the name cancer it causes this quite understandable anxiety that leads to over treatment when resources could be refocused on Gleason 7 and higher. This US doctor has an interesting take on it all
https://www.prostateoncology.com/prostate-pros/mark-scholz-md/
Apparently Gleason 5 got downgraded and once upon a time it was described as cancer but now it's discover leads to an 'all clear' diagnosis. It's all quite grey. My husbands diagnosis was G6 but with a large volume all agreed he would need treatment within 5 years so that seems to conflict with the don't diagnose G6 advice.
What I do believe is that it all should be discussed and explained.