Maybe not life "as we know it" in your basement or somewhere. But stuff has been growing on the outside of the ISS - why not in liquid water (from compression warming) deep inside a tectonic crack on Pluto?
Because there thousands of other factors that have to be satisfied that just aren't there. If stuff is growing on the ISS it's only because it came from earth. Any kind of life is incredibly complex and requires specific processes to survive...let alone come into being.
“But stuff has been growing on the outside of the ISS...”
No, I don’t think so. A few microorganisms were able to survive for a while outside the capsule, but only in a state of hibernation, so they weren’t growing.