I’ve given my view in my very first post on the topic.
The topic is fairly complex. I was asked to write a paper on the issue about 4 years ago by a charity who were considering offering a free PSA screening service for men who were too embarrassed to go to their GP etc.
On reviewing the literature I found that screening is actually not recommended by the NHS or any of the prostate cancer charities, the reasons which are well documented, including lives not being saved in statistically significant numbers.
Of course, if you are the one person who has a random test which shows a level of, say 15, you will probably end up having prostate cancer, found early, and you get it treated. You then extol the virtues of random PSA screening because it saved your life.
Sadly, this does not stand up to statistically save lives, and there are many impotent, incontinent men walking around because surgery has been performed on tumours found fairly early, which may never have harmed them.
Likewise, there are those with normal PSAs, yet have prostate cancer which kills them.
The one caveat in all this is that multi parametric MRIs are proving very accurate and serial PSAs and scans may yet prove to be the way to go.
There are also other markers which are more specific for cancer than PSA, and these may be the future in screening.
Sorry for the long post.