It's my own experience that simulations drive people crazy.
I served aboard a submarine.
Sometimes before we left on a deployment we would go through a drill called a "fast cruise'. We'd be tied up at the dock, surfaced, but the whole crew would be down below with the hatches shut pretending we were at sea and submerged. It was absolutely maddening because we knew that air, beer, and babes were separated from us by 2 to 3 inches of steel and that everything we were suffering through was just made-up. With no real danger and no real mission to concentrate on, we were left to wallow in our misery.
When we were actually on deployment we were submerged for months at a time, which was no picnic, but it was much more bearable than spending 24 hours at the pier. Part of it was knowing that death lay on the other side of those 2 to 3 inches of steel and that we were in the most comfortable spot out in the middle of nowhere. There was stress, but that stress was due to real conditions, which is much more tolerable than stress that's contrived. With real stress you barely notice conditions like the AC being off while you're sitting next to a reactor.
When the same thing was being done as a drill, we just sat there sweaty and pissed off.