Yes we have only had the one case, Animus, who was helped, but an orchidectomty wasn't enough.
In the end, he had to remove everything.
And being just one case, it isn't enough to guarantee that it would work with everyone.
Think about how it would feel, to have everything removed, and it doesn't work completely, and besides that, they come out with a
cause and cure within a short period of time afterwards.
We don't know for sure what causes POIS. We may have our guesses, and theories, but stand a good chance of being wrong. Why base a non-reversible solution on a hunch? Sounds good now.
We say, "I'm willing to do anything, anything is better than this...." until what you do makes it worse, and can't be undone.