But it's just a toilet. Apparently this board is mentally and physically fortified enough to go without one.
Sure you can poop on the food tray and have it removed but then how do you clean yourself? Sounds like an easy way to give yourself dysentery which only makes you more susceptible to further disease.
Forget about the poop. What about urine? What happens when you start peeing more than the provided cup's volume can hold? Urinating on the ground will inevitably make such an enclosed space stink. Sleep and mood would both be greatly affected.
And if you can't tell how long it's been since you have had your last meal or how long you have slept for that makes putting yourself to sleep all the more difficult. In the real world you're able to sleep because you have cues and a routine that interact with circadian rhythm. Your circadian rhythm will be completely gone when you have next to no sense of time and no way to tell how much time has passed. The only way you'll be getting sleep in this situation is from pure exhaustion.
"In return you never get sick again. If youre currently sick, youre cured."
Also he never said there wasn't a clock in the room. Adding onto it on other posts after the OP are invalid. ---