In fact, back in 2e, he doesn't offer it to his high priest, because find the path is over in the Divination sphere, and specialty priests of Kelemvor only are offered minor access to that sphere.
The problem from a world-building perspective remains; you cannot keep Troy from being discovered by denying every scholar in China the resources and education to go look for it, if there's even one Heinrich Schliemann in Europe.
Now, a setting could be written in a way that "NPCs who are not murder hobo adventurers . . . have completely different tools at their disposal to do their jobs in the fantasy world." My point in response, which you seem to have entirely missed, was specifically that for decades settings were not written that way, that the legacy settings are chock full of NPCs who have murder-hobo tools, and even backstories as murder hobos.