As a man in his late 60s, I've gotten the impression over the years, and my doctor has not denied this, that every man will die with prostate cancer. Notice I said "with", not "of". My interpretation is that the biological engineering of the prostate just isn't that good - they're failure prone. And let's face it, they're good enough. They practically always get us through our reproductive years. The "bad" cases of prostate cancer - like Frank Zappa and Daniel Fogleberg, hit in the late forties or early fifties. That's after normal reproduction, though still during child rearing years. Usually it's later than that, when the kids have flown the coop.
The other factor is if or when prostate cancer metastasizes. If it does, it's really nasty, one of the nastier cancers, and doesn't respond well to treatment. But catching it early and proper treatment generally keeps it at bay. It's a "maintainable" condition, which is probably why they're looking at re-classifying it.
Yes, my father had it. A friend of mine has it. My brother might have it. I had a scare almost a decade ago but am apparently OK. I absolutely get my routine check on it.