I would say that assumption is probably correct but I also can’t help but think that maybe this would be a good thing.
I mean, what’s the point of continuing what sounds like a horrifically painful ritual for several times a day when the only use for the amhole is sex and he has no sex drive? He already knows how painful it is to dialate so I can’t imagine sex would feel any better, and if he did find a partner then anal still wouldn’t be pleasurable due to his stunted puberty but it would probably hurt a hell of a lot less (this is a guess, it could still hurt a ton just based on its proximity to the amhole).
Everything down there is already beyond salvaging by the sounds of it so the best Jazz can really hope for at this point is at least less pain.