In my experience with extracts...
Yes, the trichome heads get ruptured. But the resin is a body that is compressed. The exterior of the block is exposed to oxygen and UV radiation. But the interior of the block is protected from it. Kind of like the way that silver oxidizes... The outer surface of the silver does oxidize, but that oxidization protects it. In my belief Hash and oil can stay in a freezer for a long time, years, without substantial degradation. Buds on the other hand, their trichomes are exposed and can degrade faster. I never leave a quantity of bud out or in light because of this. I am not fond of Clear Jars because of the UV degradation. If in a clear jar I like to put it in a place that is dark. I just take out what I need. Weed degradation is pretty fast.
Asi es la cosa, la cosa es asi.