There's very good reasons for NOT having your prostate removed 'pre-emptively'.
You will have heard of women having breasts removed when there's a high familial risk, no doubt. But there's major differences with the prostate:
Removing a breast, though it may have psychological implications, is a relatively 'safe' procedure. The breast, being outside the ribcage, does not impinge directly on any other organ. While there are (usually small) risks of bleeding, infection and anaesthetic, there is virtually no risk to other organs.
Removing the prostate has all the same risks, plus the added - and much greater - risks of nerve damage, bowel damage and bladder damage.
Additionally - though I don't know the detailed statistics - women who have mastectomies for familial cancer are avoiding the near certainty of a form of breast cancer that carries a very high mortality risk. With your family history, your risk of prostate cancer is significantly increased, but it is by no means certain. And, should it occur, your mortality risk is about 50%; probably less, because with monitoring, you are likely to catch it early, if it happens at all.
Very different situations! Keep regular monitoring; search this site and other reputable sites for advice on the optimum frequency.
And remember that a raised PSA is NOT a diagnosis.