I agree that it’s goofy and dumb, but on my second viewing it became clear that the dude who killed Rey’s parents is the one who forged the knife, Sith runes and weird wreckage skyline and all, and that it was not some ancient artifact that completely coincidentally pointed to a certain spot in a wreck that didn’t exist 35 years ago, which was the impression I got the first time.
I still don’t get why Ochi left the wayfinder in the wreckage. He put all the navigation information into D-O, so we know he had the wayfinder at some point. Maybe he got it from a different wayfinder? I dunno.