PSA screening is hardly more than habit and tradition. Contrast it to ultrasound screening of carotid artery. Screening companies are pushing it all the time. It is cheap and safe. But I bet most of you don't do it. You and your doctor never got into the habit and evidence based medicine stepped in first to not get you in the habit. Without symptoms there isn't a good reason for the screening. The bottom line is that the test for asymptomatic people does not do more good than harm. Same with PSA.