At age 71 your personality is not going to change - mine hasn’t. If your gut is telling you to treat now, then just do it.
The studies are correct: No statistical difference in treating now or 5 yrs from now. As long as you are monitored with 3 month PSA tests your cancer - if present - should not spread our of the prostate bed.
But can your personality handle .01 or .02 rises in PSA every 3 months? Or a sudden rise by .04 that then drops at the following test? That’s the real question IMHO.