> and all of the pretty plants and oxygen in your biosphere will be dead from having been almost instantly frozen

This is a myth. If you remove the air from a spacecraft you don't instantly freeze, nor almost instantly freeze. Without air there is no means to conduct the heat away from your body, so you'll stay warm until you radiate your heat away.

The effects of sudden decompression are more an issue than freezing. The moisture in your mouth and eyes will start to boil off, the dissolved gasses in your body fluids will start to come out of solution. But if you can fix the decompression issue quickly enough most things will survive.