So why would you assume there is a settlement nearby because of freshwater? Dead fishermen? Yes. Freshwater? No.
Hey, what gives? Whose survival skill are we using here, anyway? Yours or Tav's?
And as far as a village goes that the nautiloid crashed into and devastated and is on top of, there are literally no signs that this is true. There is not one shred of evidence that points to a village being there in that spot. No ruined buildings, farmlands, cattle, nothing. So...
... but then... you were probably joking. Right? RIGHT?

Oh, there's plenty of room under that flaming Nautiloid. Check out the map. It's at least as big as the Blighted Village.
And look, there's a couple of docks, one on the west side and one on the east. Dead fishermen all over the place. I'd be surprised if there wasn't something under all that mess.
That's the weird thing. We see crumbling structures in Moonhaven, but we see nothing around the nautiloid. It's just... docks, and dead people, and fish, and boats. You actually don't get the sense of where these fishermen lived. It's almost like they commute to the dock area, but where do they commute from? (For that matter, the PC says "there must be a settlement nearby!" and then we never find it...)
I'm hoping we do come across the village once the full game is released, because having a bunch of dead people around you who are clearly locals, and then never finding the rest of the locals is a bit creepy.