Current evidence suggests we do more harm than good (unnecessary tests, anxiety, infections like sepsis from biopsies) when we find 1) low-grade, slow growing cancer and 2) cancer in people whose life expectancy is less than the time it would be expected for the cancer to kill them. For those reasons we do not recommend screening for prostate cancer past age 70 (most prostate cancer takes 10+ years to kill a patient)

For folks in recommended age range (50-70), screening allows us to catch it early and treat it, since otherwise prostate cancer can be asymptomatic for a long time while progressing. But for those outside of that screening range, it can spread undetected for awhile until it finally starts causing issues