I upvoted your comment because it is largely correct. Most cases of prostate cancer can be responded to by "watchful waiting" with no particular treatment. However, I will note for the record that the cause of death of my late father-in-law in Taiwan, who had good medical care under that country's single-payer national health insurance program, was metastasized prostate cancer. He had successful heart surgery and other treatments that prolonged his life into his eighties until the prostate cancer got him.