Body Integrity Identity Disorder

To me Body Integrity Identity(BIID) is non-existent and I have never heard of this and in no way would I have ever thought that such an illness exists. How would one treat an individual with BIID you say, I believe the only way to treat such an illness where one has the urge to amputate a limb or even any body part for that matter is to handle it psychologically. There only other way I can think of is if their urge cannot be stopped then replace their body part with something technological like Body hacking or something of that sort. I can only assume that with the article's assertion that people with BIID are middle-class white men that it can be concluded that the illness is related to wealthy white men with the upbringings of a white-cultured family. Some people will definitely call this a utter waste of time spent or treatment when they are just looking for attention. If one of my friends told me that they wanted to amputate themselves, I would not believe them at all and take them for granted. If BIID and gender identity disorder(GID) have immediate parallels then what is different between these people and regular-deemed people. Now I can't help but wonder when I see someone amputated whether or not they are amputated because of a misfortunate event, an act of violence in war, or BIID. Now all these factors are out there which makes me wonder. If BIID is a illness that is barely advertised or spoken about, what else is out there. When I hear the fact that someone wants to be disable and deliberately disables themselves, it just makes me wonder, why? what goes on in their mind at that exact moment? do they think it's cool, the norm? What is it? I just don't understand. 
How can people live to the fullest knowing they could be running with the wind in their faces enjoying the breeze while they are sitting in a wheelchair amputated. I believe this is a form of potential suicide in itself because on the off chance that the amputation does not go as planned or goes horribly wrong then one will have to live knowing they deliberately killed that person for no reason, it just makes no sense. "Now, years later, Josh says he feels wonderful without his hand, that his amputation finally ended a “torment” that had plagued him since middle school. “It is a tremendous relief,” he told Newsweek. “I feel like my body is right.” This tells the story of a man who had BIID and felt the need to amputate his hand saying it just felt right that way. So my question is, how did it feel with the hand? I hope treatment for BIID is found and patients are well-treated because anybody born that way, I would say is "unfortunate" to feel that way and thats just my opinion. I feel as though we have all our body parts for a reason and with each body part comes a function that they serve. BIID is a illness I would not wish on even my greatest enemies. I believe i to be somewhat of a "curse".