While there are exactly one-million pre-tax reasons (those would all be dollars) to put yourself through that kind of misery, Survivor can and will kick your ass. If the mosquitoes and the hygiene and the sleep deprivation don't get to you (and they do), the starvation eventually will. Your diet is the hardest part -- and not just while you're on the island. I was a contestant on consecutive seasons in 2012, followed by an obnoxiously brief stint a few months back, and my body has never been the same.
The muscle mass I lost after nearly 80 days of food deprivation clearly has no intention of ever returning, and to this day I'm stuck with backward eating habits and a too-sensitive digestive system. (And please, for the love of all that is holy, if I ever come to your house for dinner, do not ever serve me coconut.) Yet most people don't believe that what happens on Survivor is real, and you can't really blame them.