Drop one and it disappears in the bottomless fluffy whiteness. Tent poles won't obey mittened hands. Take off the mittens and the metal sticks to your skin. Your hands are soon numb, as metal conducts heat away even through mittens. Tent lines are ticklish to get around stakes or trees.
Knots take forever to tie.
In fact, every little process takes two or three times as long. Meanwhile, light is fading fast, temperature's dropping, maybe the wind's picking up and changing direction from what you had in mind when you oriented the tent. At last you're inside, safe from the elements. But if you think it's crowded now, just wait until morning when a foot of fresh-fallen snow presses against sides and roof. No place for claustrophobics.