I agree that being put into stressful situations and learning to do things properly, even if it's as simple as eating, is an integral part of training, but once OCS decided to stop allowing class team members to kick over your gatorade/water or make you eat by holding your tray out for doing the eat-by-numbers thing wrong (thankfully not something I had to deal with), it lost its purpose. It's just a ridiculous exercise in stupidity.
It wouldn't be terrible to keep it around for the first month or so as part of the initial indoctrination, but eating by the numbers 2 days out from candio phase when everyone is focusing on the junior class was fairly stupid.
You also missed the part where I said no other commissioning source does this -- Navy or otherwise. I'm fairly sure they find plenty of ways to put their OC/Midn/Cadets into stressful situations regardless.