Besides, the map only states that the location is 'about' right.

I guess we'll never find that treasure, Bob.

I don't believe it's there." "Would you think it worth trying for ?" "I don't believe I would.

I might have to sail around for a week merely to locate the island, and the chances would be I'd miss it.
Then if I did find it, it would be very unlikely that anything would be buried there.

I don't take any stock in those Captain Kidd yarns.