What exactly is the point of dialogue like this?

Like @John-Hatter said, it's a comedy bit where the vendor mistakes you for someone else.

More to the point; Why would you assume that the game would simply give anyone who reads this piece of dialogue a key that can open anything?
It'd be completely game breaking, because we already don't need keys to unlock any chests, and if we could use this invention to open Fort Treasure Rooms, no one would ever bother to finish a fort.

@tundra-793 The point here is that this is very specific filler dialogue, I don't understand why it would be so specific if there was no truth to any of what he said. He mentions a door under the water near Wanderer's Refuge, but there is no such thing at all. So why does he even talk about it?

@mad-mordechai He mistakes you for someone else, who did the thing with the key.
The whole bit about the hidden door, and invention happened to some other NPCs, it has no bearing on us as players.

It's meant to enrich the world, since we now know that some other pirates might have invented something very useful, and therefore valuable.
But it's not like we're ever going to get a key that can open anything.

This reminds me of the merchant npc who mentioned catching sharks, hopefully they add in content that makes it true, otherwise I kinda agree that with the game we have stuff like this should be there already if the dialogue is. Maybe it’s in true rare style and there really is just an extremely hard to find Easter egg like in old games, because it used to be that if you found dialogue like this, 9/10 it had some meaning within the game world, even if it was just a stupid invisible wall with a room with an Easter egg or something. Those were single player games though.

@john-hatter I don’t think it Has to equal content based on most games, but this being Rare, and the lack of content in the game makes it a bit obnoxious, it’s similar to the lack of thought put into pricing cosmetics... I don’t think mordechai is anywhere near being truly upset about this, just that it’s one of many things to question what rare was thinking, at the very least there should be a locked door on wanderers, as is it’s like the guy is speaking about a different game lol.. one that has npc and players interact with meaning, and has hidden secrets on islands and items like keys to use. As is we have none of the above.

@tundra-793 It would have enriched the world if it had some base in reality here, because there is no such landmark. The whole dialogue should have been about something else or been less specific in this case. Maybe if they had followed it up with a little note somewhere on the outpost explaining that the key had been taken or lost forever? at least have something that backs or follows up on the very specific story parts here at all, but there isn't.

@john-hatter yeah I hear you, I would probably agree if the game wasn’t lacking content, and dialogue based Easter eggs weren’t a thing Rare is known for.
No worries, but nitpicking is all we have left, we gave them ideas for 2 years in depth and we ended up with bananas to eat and an oil spill and 3 out of the like 7 forts active, and fetch quests with lots of item skins, that serve no specific purposes.

I think posts like this come from a place of “well maybe they can handle changing dialogue or the cosmetic pricing, since that only requires typing” atleast from my perspective I can’t speak for mordechai.

I looked, but not super closely, and couldn’t find a door. I couldn’t say I expected one, given that this game seems about 60% developed. (A good 60% though). My guess is they will eventually start doing this type of thing during weekly updates.

@lord-sphinktus This has nothing to do with the Pirate Hideout entrance, not sure where you're even getting this from. Unless you can prove that the instrument somehow opens a secret door near Wanderer's Refuge, which it doesn't.

@mad-mordechai i too have been burnt, it really helps to take away the soul of it all.