how is he right? there is no worldwide study done to confirm all men of older age develop prostate cancer.
If you reread my post, you will see that I allowed for those few who do not develop prostate cancer. Moreover, it was my urologist who told me this. He likely has more knowledge and experience than either you or I.
"By the time a man is 60 years old, it’s almost certain he has at least a low level of prostate cancer. Reassuringly, if men keep their immune systems functioning properly, this cancer stays at such a low level that malignancy never becomes a concern. But all men need to know how to recognize when prostate problems are starting to develop."
http://easyhealthoptions.com/all-men-get-prostate-cancer-what-are-you-going-do-about-it/The article goes on to say that 1 in 5 or 6 get prostate cancer, which is a lot, but not all or most all. It also says that the odds of having prostate cancer at 60 years of age is about 70%.
Just so you know, I almost never speak in terms of absolutes. There are most always some exceptions.