Some valid points! Not many roosters are going out in subzero windchills for very long without seeking shelter from the wind now and again. I'd also note that the comb and wattles of a rooster have WAY more vascular flow than do the surface of the skin of a human's nose, cheeks, etc. Even the type of skin they have on those areas differ from the skin of a human's face, being much less vulnerable to exposure to weather.
While observing my own flock out foraging around in weather that is -1 according to the windchill, I didn't note any shriveling or contracting of the rooster's comb and wattles, nor in the hens that are currently laying. They seem to have more blood flow simply due to their hormone activity compared to other members of the flock, so their combs and wattles are loose, deeply red and fleshy compared to the hens not currently laying, which show decreased size, color and an increase in dry looking skin at the surface. Pretty much the same way they look even when it's not that cold when some are laying and others are not.
While observing my own flock out foraging around in weather that is -1 according to the windchill, I didn't note any shriveling or contracting of the rooster's comb and wattles, nor in the hens that are currently laying. They seem to have more blood flow simply due to their hormone activity compared to other members of the flock, so their combs and wattles are loose, deeply red and fleshy compared to the hens not currently laying, which show decreased size, color and an increase in dry looking skin at the surface. Pretty much the same way they look even when it's not that cold when some are laying and others are not.