I wouldn’t think so. But they might well worsen on tx, particularly if your institution uses daily rectal balloon.
If they’re truly bothersome (and you’re worried about ability to get through tx for that reason), could consider asking a general surgeon to take care of them first. If he has lower risk disease, the delay won’t matter, and if higher risk disease, will be on neoadj ADT anyway so you’ve got some time.
In addition, could BB anal verge at time of sim and make a special effort to keep dose off it (while not undercovering).