Society and women even more think that height in men is the most important aspect in a man's appearance.
That's a fact and everyone, especially short men, know that because they see it everyday.
That's why every less than average height man (not only very short men but just less than what is considered average height for a man which in the west is most of the times 5.10) is completely righteous to want to do LL.
After all, why should someone accept the idea to have less opportunities in life for something that he can change physically but there is still a way to change it with a surgery?
That said, a man above average has no real reason to do this surgery and I totally agree that some guys who are like 6 ft and want to do LL to become very tall have some mental issues that won't be fixed with LL and no respectable doctor should take them as patients.
But for any other man (because for women height DOESN'T matter, except they are super tall like 5ft and less, and I am downright about that), LL is justified.
Maybe one day that height won't matter and men of every height would have the same chances in every aspect, LL would cease to exist.
But this day won't come soon and personally I believe that it will never come because society becomes more and more superficial.