Wow, that's a seriously comprehensive rebuttal! O_o Thank you. :)
My apologies for not being clearer up front. The 'watery' look I was referring to is the one illustrated in around half the inworld screenshots above where the entrance to a wormhole looks like the *surface* of water - like a rippling pond turned sideways that you step through. I completely agree that a vortex with a liquid look to it is a very common depiction of wormhole, and it's interesting to learn that there's sound scientific reasons behind that. It's specifically the 'upright pond' look that I find problematic.