Suspicion: +80% of paladin playtesters in their closed group ended up with the broken oath state at that point, from dealing with the fishers and having some of them die due to failed checks and no fault of their own, so they doubled down on the flippant system and just removed the 'problem point'.
That's certainly possible, but I doubt it. I imagine that each broken oath state had to be coded specifically. I doubt that there are universal tags for things like "innocent" or "lie" established. We can kill the Mindflayer, and it's laying helpless. I feel like they would have had to specifically code it, and given that, it seems like it would be easier to just not make it a broken oath trigger as opposed to removing what was a solid scene.
My theory is that someone took issue with the fact that the fishermen didn't seem to have anywhere they could reasonably come from, since the place is so far away from the nearest habitation. It's a weak theory, but it's mine.