Modern freezers have defrost cycles. Because you don't get soft meat doesn't mean it doesn't have temp variation. A tiny amount of moisture can wreck havoc a peptide. Refrigeration is fine for storage
Here’s a visual example from one of my freezers to demonstrate what Narta said about temperature variations and as you can see, there’s some significant variation, especially during the defrost cycles.
The other picture is from a freezer that I have that does not have auto defrost and there’s much less variation.