I suppose the difference is that a GPS coordinate is something concrete enough for the audience to understand that only his translation would retrieve. But when you start stepping into the mystical territory, then the audience may begin to ponder if 3PO was even necessary because we don’t have any frame of reference for how such a thing would work. Anybody has the right to ask at that point: why didn’t Rey’s dark emotions allow her to “use the dagger” to begin with?

And as for Kylo doing that, it works because it’s the villain doing it. So there is a loss, but not because the crew did something wrong. Whereas in this case, it makes it seem like Rey wasn’t very bright for not figuring that information out on her own. So she did something wrong.