I think I've landed upon one bit of evidence.
Philosophers more than chemists tend to ponder this one, but I think the clue to our fish-in-water nature is literally at our fingertips every day.
Are we trapped in such a narrow range of living conditions so attuned to earth that it would be impossible to start a life anywhere else within 100 light years?
To believe one is a fish in water, one must admit to the possibility that it can be just as complex and real outside of water, in conditions deadly to oneself but just fine to the creatures who live there. While that world will not be inhabitable by you with adaptation, not in your lifetime or in 50 generations, it is inhabitable. The methods and means can never be imagined or devised by humans. Even if there was a way that humans could be told, it will still not make sense.
A good example is electronics. The science of electricity. At first blush it seems impossible our human limitations have any effect on this science. It’s nature has been discovered down to the electrons and neutrons. Our range of understanding that extends from naturally-occurring lightening to billion-dollar particle accelerators bespeaks of our grasp of the whole idea. . . right?
Yet . . . why are all our electrical devices ‘happy’ at exactly the same temperature range as ourselves? They overheat when it’s above 150° F. and they don’t work right when it’s below -10° F. In fact, they work best when it’s between 50° and 80° F.
Yet electricity in nature works from -80° to thousands of degrees. The only electricity that seems to care about such a tiny range is the stuff we generate and tame.
Don’t reply that it's the limitations of materials; even when our finest minds want to design for 300° F. or -90° F., these finest minds devote years to simply duplicating something that works just fine at 75° F. Even the cooling of supercomputers is for the purpose of bringing the swiftly-heating working parts down to room temperature.
In fact, almost everything we build, whether out of elemental materials like aluminum or concrete or of earthly materials like cloth and plastics tends to function the longest at the very heat and humidity that is most comfortable for humans. Once moving out of that range, to say -30°F or 150°F, it degrades, develops cracks, changes shape.
It stands to reason this may be the reality for several materials or elements–but not ALL of them! We can look at outer space and the neighboring planets to see that all the elements are perfect-functioning for millions of years outside of our comfort range.
Almost everything we've designed is human. It works best at temperatures, humidity, air pressure and acidity that a naked human could stand for two hours.