You make a good point, but up here in the sub-arctic the night time is very often at or below fridge temperature (~5C). When it doesn’t it often never gets dark at night anyway.
At the opposite extreme, a good calima in La Palma can result in the air temperature being higher than 20C all night and even a good two-stage Peltier cooler can’t get a camera much below -15C. Been there, done that.