Interesting topic you've got here, really informative doctor, thanks for sharing it!
Well with my little knowledge, I was surprised that I know various things about prostate enlargement. Talking about aging and cancer, it increases due to accumulation of somatic mutation so no wonder that's the same for prostate. Personally I haven't seen many people with prostate cancer especially over 50 years old, yet still long way in my medical career so I will face things like that a lot and your post was so much help as information to build on.
Oh...you will see a lot of people with prostate cancer as you go on in your medical career.
Just try to go to a urology clinic