I firmly believe in the right to bodily autonomy and the freedom to modify one's body in accordance with their wishes. But also this definitely fits in the same mental category as breast augmentation where I hope people discuss their body image with a therapist first.
I'll admit, as a tall woman I'm probably the least likely sort to really understand, but I am sympathetic, even if I was attracted to men it would be unlikely for any given partner to be significantly taller than me, and as I'm not it's downright rare. There's lots of gendered awkwardness in being taller than most men, and I'm certain that short men aren't lying when they say the inverse is also true. But also, the short men in my life still feel pretty damn manly to me and the ones who own it have a certain extra charm that comes from that.
Also, the article mentioning guys over 6' doing this, and I really hope those guys talk to someone about it, because that sounds like it might be dysmorphia.