Very true. It's also important to recognise that some types of prostate cancer (the kind the public is aware of) develop so slowly that people often die of old age before there's serious progression, while others are so aggressive that they can kill you within a couple of years of diagnosis unless you get immediate treatment. There's also a spectrum in-between.

Your right , Some kill very rapid , while others are not so rapid and remain in background while something else will kill you . More men die of Prostate Cancer than people die of Brest cancer ! Not opinion , Fact ! Yet it only gets 2-5% of funding for research .