Comment by glenstein

True enough, but it's still incumbent on us to understand what other biochemistries are plausible based on what we know. We look for things like organic molecules and planets in habitable zones because we know a lot about the mechanisms that allow them to support life.

And we are curious about alternative biochemistries, I think that drives a huge amount of curiosity toward Jupiter's Galilean moons especially Europa. My worry is that people say "well there might be other biochemistries" as a deepity that kind of checks out from looking at any specifics, unfocusing conversations that were actually more focused prior to the emergence of the deepity.