The only usefulness of a map or a language depends on the similarity of structure between the empirical world and the map-languages.
If the map shows a different structure from the territory represented -- for instance, shows the cities in a wrong order. . . . then the map is worse than useless, as it misinforms and leads astray.
The map is not the territory. The only usefulness of a map depends on similarity of structure between the empirical world and the map