The reason they quit screening for it is that prostate cancer screening was found to have zero benefit on the number that really matters: how many die.

The thing is prostate cancer is usually a very slow cancer. Very often the proper response to a diagnosis of prostate cancer is keep an eye on it. Being aggressive about going after prostate cancer means more patients harmed by treatment (can you say "erectile dysfunction") but no lives saved. The few saved from cancer are offset by those who die from treatment.

There are basically three types of cancers and note that other than by observing what happens over time the doctors can't tell them apart:

Aggressive cancers. You're dead. The doctors putting you through hell might buy you a bit more time, but that's it.

Slow cancers. In most patients you'll die with the cancer, not of it. Prostate cancer tends to fall into this category.

Middle of the road cancers. These are the only ones where treatment is actually of much benefit to the patient. Found early enough you might even get a cure.