Excellent point. Having been a physician for about 45 years, I have witnessed first hand the disparity in skills and knowledge among physicians. As quickly as the treatment of prostate cancer has changed over the last 5-10 years, it is imperative to have a team that is up to date on the latest treatment regimens. It is very difficult for a general oncologist to keep up with treatment of all cancer types. A medical/radiation oncologist and urologist that specializes in GU cancer treatment at a major medical center is likely most qualified, but, of course, there are always exceptions.
I would hope that some less informed men on this forum do not take the information and/or recommendations as gospel and try to apply that to their own situation. Each is different. As you say, this forum does provide some excellent information to jump start conversations with treatment teams or maybe question if some need a new team with more specialized care.

Good luck in your journey.