So because of all the attention this has gathered, and because I was genuinely curious, I went into Wanderer's Palace hard mode to test this. Solo unsynced. I'll happily go in with a full party to test it too if you want more proof.
But for now it seems you're wrong.
I did multiple tests, and I'll upload the video if you like, but turning away does not stop doom from hitting. The only way that doom seems to not cast is if you have a AST or SCH shield on the target and they take no damage from the Soul Douse cast. Either way it's the healers responsibility.
I've been playing since those dungeons were released and I've never seen any theory that you could turn away from that, but feel free to link proof of those videos of people turning away to avoid it.
I can't think of any look-away mechanics that do not have the gaze marker. Honestly it makes no sense. The only clue we even get for that mechanic is if you heal the person it a message in chat pops "HP is full. The death sentence has been lifed!"
Edit:Someone else has already uploaded their proof, but I will happily add mine too if I need to lol



Someone else has already uploaded their proof, but I will happily add mine too if I need to lol







