Because 10cm are not enough for many of us.
I wouldn't do 2 LLs only to hit 1.78 while I reached 1.75+ with 1.
And if I didn't used crap monorails and could walk from the beginning I would't have bf and do atl and all these , I'd have beem finee even with 7.5cm on my tibias.
My proportions look better than before LL and after a second 7cm on my femurs I'd look even better.
5cm are safe(r) but that doesn't mean that with 7cm you'll have permanent problems, especially on femurs.
Yes, the rehabilitation will be longer but nothing more.
And yes, if someone has a good starting height then 5-6 cm in one segment are more than ok but if someone is less than 1.65 then 10cm are nothing special for all the money and the time 2LL need.
Moreover, 1 LL of 5cm is nothing for lets say an 1.60cm man. He becomes from way too short to just very short. Nothing special.
So for all this reasons people do more than 5cm. And it is very normal.
I find that hard to believe. This is what someone who lengthens 3 inches looks like:
And after that point, it only gets worse. Remember for every inch in human height, the head, chest, hands, etc... They all get much bigger in proportion as well.
Idk, maybe I just see this surgery different than 99.9% of the people on here. I'm not trying to be "tall" I know I'll never be tall, my 5'6 head, frame, body, torso length, chest, etc.. They were never ever meant for a tall person. That's fine, I'm alright with being 5'8, 5'9, I know I can look reasonable there. But I definitely won't look reasonable at 5'11, standing next to other guys.
Not to mention the mechanical problems you'll face when you pass say, 8cm total as well. A lot of people on hear don't want to accept it, but it's the reality. Be thankful that you are able to cheat your genetics for any height at all, but you won't be tall and you won't look good tall nor will you function well.