I've heard the Newspaper accounts are rubbish. NOT a big surprise.
I guess I'm coming in from this from a different direction. Dr Alter (I believe) said he would do an "elective" if the person was not insane. If I understand Dr Bowers policy I think this is pretty much the same thing. Dr Reed in Florida does this but I'm not sure what if anything he needs up front before he will entertain the idea. By "elective" I am defining this as a person asking for this for gender issues (Not wanting to be male - and could be a step in M2F or just M2E) Elective might also be a person with a very high out of control sex drive or one who just is afraid of what he is going to do.
That said if your saying people with mental illness should be able to do this I respectfully disagree. My understanding is that being mentally ill = lawsuit for any doctor.
Ok, if we are talking a "medical" issue? Such as Orchialgia, then the list of Surgeons is much greater. Here I think all you need is a surgeon from a large hospital that has lots of experience. SOME won't do an orchiectomy for any reason outside of "maybe" cancer. This is (to me) the issue that this goofed up story does us a disservice. It paints a picture of Orchiectomy for ANY reason other then life and death cancer being insane and abnormal.
I know there are another group which I will call the fetish group that I don't mention. Insane? Not always

but clearly they have to seek a solution from Dr Kimmel or?
With what "can" happen I hope our friends here won't try the do it yourself approach. Infection, bleeding etc are all too scary when death or serious injury is a real possibility.
Please ! Work with a doctor. If they can't or won't help find a new one. There are professionals out there that can help.