I agree with most of what you say! There are many factors which determine a persons risk for cancer, age, family history diet etc. But there are many studies now showing that people aged 40-75 having a 30% decrease in the chance of all diseases including cancer!
Here is one studies findings:
"Researchers conducted a nested-case control study (meaning controls were chosen from the same population group) of 11,606 men ages 40 to 79 years who were free of known cancer and cardiovascular disease. The men participated in the European Prospective Investigation into Cancer in Norfolk (EPIC-Norfolk Study) from 1993?97. Their blood samples were taken at initial clinical examinations and frozen for later evaluation. Among 10,423 men who had no known heart disease or cancer when they entered the study, 825 died over the 10-year follow-up period, which included 369 cardiovascular deaths and 304 cancer deaths.
Researchers analyzed frozen blood samples from the 825 and compared them to samples from 1,489 study participants who were still alive at follow-up, classifying samples from both groups into four categories based on testosterone levels. The average testosterone level for men in the study was about 16?17 nmol/L. Men who had testosterone levels of 12.5 nmol/L or less were in the bottom 25 percent, while those in the top 25 percent had testosterone levels of 19.6 nmol/L or higher.
Khaw said the findings might prompt questions about prostate cancer since suppression of testosterone is a recognized treatment for prostate cancer; however, there is little strong evidence to show that endogenous testosterone levels are associated with prostate cancer risk.
In this study, too few prostate cancer deaths occurred ?to examine the question statistically,? Khaw said. ?But at least in terms of mortality from any cancer, there was no evidence of any adverse relationship with testosterone; in fact, there was an inverse association."
From personal experience I would have to agree that suppresion of testosterone is not the way prostate cancer should be treated. My father who recently passed away from cancer which originated in his prostate had his testosterone levels checked and his test levels were extremely low! If suppression of testosterone is a treatment for prostate cancer, that is to suggest that it is the cause of prostate cancer. I know it's not this simple but that is the basic understanding of it.
This experience has lead me to do a lot more research on the topic for personal reasons and more and more studies are showing that aging men with lower testosterone levels have a significant increase in developing disease of all forms, not just prostate cancer.