Armor protects you from freezing damage

I don't think tank armor is supposed to prevent you from freezing to death, is it?

How to reproduce:
1. Place some Powder Snow
2. Put on full Netherite armor
3. Go in Survival, and stay in the snow until you begin to take damage
4. Leave the snow, then take off your Netherite armor.
5. Get back in.
6. Notice the difference.