There are risks with every medical procedure. There are also risks by not having the procedure, such as potentially letting cancer grow out of control. The risks of prostate biopsy are extremely small or thousands of doctors would not be performing them daily all around the world....the insurance companies wouldn't allow it. I suggest you read the listed risks and side effects of aspirin and see if you would ever take one again.
It is wise to know these risks of the prostate cancer biopsy. If you feel they are too great, then don't have one. No one should have a biopsy that isn't properly indicated. Sometimes it can be a tough call. My brother's brother-in-law had one with a PSA of less than 1, and G9 disease was found. He has had surgery, radiation, two periods of HT and 10 years later his PSA continues to rise. But if they hadn't done the biopsy and found it then, by the time he would be symptomatic it would probably be from bone mets and much more difficult to control.
I can't imagine that a surgeon, rad-onc, or med-onc would dare treat a patient without first having a biopsy to know the facts of the case. Apart from the problems of potential misstreatment, the insurance company or Medicare would not authorize treatment payment without first using the appropriate diagnostic tool. Call the biopsy a necessary evil and be cautious about it, but at the end of the day it is the current gold standard of diagnosis for most all cancers.