If I were you I would monitor my PSA over, let’s say, the next year, and if there is any obvious increase, then elect for a template biopsy under general anaesthetic. It is not proven that biopsy needles can cause cancer to spread.
If your clinicians are quite laid back about your lesion, leaving the choice of whether or not to biopsy up to you, I would be as well. Keep calm and carry on as normal and revisit the subject next year.
Best of luck.