The main thing people should worry about are the serious risks, complications and consequences that can arise from CLL.
I also think CLL is a choice between your natural proportions and perfectly healthy, pain-free legs and the height. Which is more important?
Though, "perfect" proportions are completely subjective. Natural proportions aren't necessarily perfect, and perfect proportions aren't necessarily natural.
A guy with a sitting height ratio above, say, .53 and a wingspan 2 to 4 inches bigger than his height would look more proportionate (in Western ideals of beauty) after CLL than before it. Funny how having legs on the relative shorter side and arms on the relative longer side can do that to you.
Still, this is an extreme procedure. I don't like talking about those factoids because it's like I've been sold the surgery and I'm spreading it... Remember it's about breaking your bones, pulling them apart, 7+/10 pain levels, multiple surgeries (that may bankrupt you), and hoping the gap will fill and consolidate well enough. The recovery process takes years to fully complete. We have reported deaths. Then you hope the final alignment by your doctor was good enough so you can prevent osteoarthritis. We are still far away from height increase procedures that we could easily call "cosmetic". CLL is indeed technically cosmetic, but in the way that amputating your own hand to replace it with a metal prosthesis is cosmetic for prosthetic enthusiasts.