Yes they are not actively growing in those environments, but as long as they can return to that active state, they are alive. Many organisms (especially “simple” organisms like bacteria and lower eukaryotic life) are able to enter these non-metabolically active states, sometimes with extra protection (like the water bears, spore forming bacteria, and lots of fungi and yeast) allowing them to survive those extreme conditions. Arguably this is ability is more interesting and without a doubt it’s more important for the survival and dissemination of life across earth, and potentially across the universe. We may have already spread them ourselves :)

great explanation! its crazy the environments that bacteria can survive. Waters bears too.

To add to this, you can use alcohol to kill cells in tissue culture quite easily. A good part of our resistance to many chemicals is basically dilution, as you said.