On the one hand, if surgery and/or various enhancements are an effective tool to give someone more confidence, and it's not really directly hurting anybody else, then my opinion is go for it.
To me, shorter men are hot, the size of your penis is pretty much irrelevant (bigger is not always better), and bald/balding/shaved heads are the bees knees. I mention the dick and the head o' hair because those are, in my experience, two other areas where men are commonly insecure.
Obviously I admit that as a gay man, my view on things may be different than that of a typical heterosexual woman. But overall, I really wish guys didn't feel the need to obsess over things like their height.
I don't have a link right now, and probably won't bother to go looking, but I was scrolling through posts a few days ago and saw one with a guy, who I would consider good looking, mentioned his height and weight. I clicked into the comments, and literally like the second most upvoted one in there referred to him as short. He was 5 feet 9 inches (a bit over 175 cm). Granted, it wasn't a derogatory comment if I recall correctly, but just the fact that it referred to a very average height as short really caught my attention. Now imagine if the guy was sensitive about his height and what that might do to his confidence.