So what if the alien life we encounter evolves in a non-aqueous manner/environment?
“Human Steve, Human Steve!” The alien wailed, “the sky is falling, the end is nigh!”
Steve sighed and buried his hands in his coat.
“For the LAST time Gary, it’s just rain.”
“Alas, toxic dihydrogen monoxide”
“-comes crashing down from above poisoning the faithful ground of the planet known to those who live there as Soil.”
“Woe unto those who once cherished the lands that bore them only to have it so tragically torn away in an unforgiving chemical storm…”
“Human Steve, you have my most sincere condolences. Our people extend the hand of friendship in these hard times and offer you our hospitality until-”
“It’s fine. Water’s a part of our planet. We’re used to it- we even drink it, in fact we need to- I’m about sixty percent water, it keeps us running. Seventy percent of the Earth’s surface is covered by water, it’s in the air on the mountains- all that blue stuff you were asking about? Yeah, that was water too. You know what we should have probably called the place ‘Water’ it would have made more sense.”
Gary stopped, the slightest of quivers visible as he stared at the Human.
“You drink… water?”
“Yeah, all the time.”
“It does not harm you?”
“Not unless you go trying to breathe it. Then you drown.”
Gary let out a whimper.
“I would very much like to go back to my ship now.”
“Of course. Here, I’ll lend you my umbrella.”
“Hey, just because we’re ‘immune’ to water, it doesn’t mean we like getting wet.”