Height neurosis sometimes cannot be cured with therapy. TheAlchemist, a user on this forum, tried therapy for years and still retained his height neurosis. You'd actually be surprised how much a few inches makes in a person's lives. Height neurosis is a body dysmorphic disorder, so obviously it's not going to appear rational. People on this forum suffer because they feel they have short stature and lives have definitely changed because of this surgery. If you wanted a rhinoplasty because you had a hump on your nose, I don't judge. That hump isn't really doing much to you, so it's just a complex and people get insecure about certain parts of their body, and some decide to change it with surgery. Nothing wrong with that.
Now if you're asking, "this is so dangerous, oh my god why suffer so much for a few inches."
I guess my answer would be, if people don't get the surgery, they still suffer. They have a different kind of pain. A pain that lives with them for the rest of their life. Whether it's rational or irrational (mostly the latter), it doesn't really matter. LL is a risk that a desperate person will take to overcome their height neurosis. I don't think anyone doubts the craziness and risks of cutting your healthy legs in half for medically no reason- but that's a risk that's a desperate neurotic person will take because of how much height affects their life. There are people in their 40s and 50s who still have this mental condition and end up doing the surgery at that age. It probably does go away with time for some people, others it stays with them forever. But that's not really relevant.
For height neurosis people, we are willing to go through this procedure because of how much we are fked in our thinking because of our height. Yeah, we could be confident, we could succeed in life, we could have great partners and family, but a feeling of "defect" is just there. Many times it's not rational, like I've said already. There's no reason we should feel like "less" of a human because of our traits. But we do. And LL is a procedure that can fix that void for some people- maybe not for others. Whether you agree with it or not, the option of LL has given thousands of people the ability to live a normal life free of a mental neurosis- I think it's a pretty beautiful invention no matter how barbaric an operation it is- it can and HAS helped thousands of lives (just talking about cosmetic LL here, obviously LL is used for more than this as well).
Until you've lived it (by "it" i mean having height dysmorphia/neurosis), you probably wouldn't understand it. It's a normal reaction to view LL as crazy for the general public- and it's also why we gather on this forum to talk about this life changing procedure without judgement.