Can you imagine how much it would SUCK to crap yourself in a suit of platemail+helm? Not to mention the chafing, chance of infected hemorrhoids from dysentery-like "eruption", and having to be shield-buddies with a guy who smells like a giant tin can of rotted gluteous maximus...
That was kind of what they did though. They didn't have time to take off all their armor, they just went where they were lol. It's kind of part of the package.
