If I were defending the view that tourist guides act as a sub-part of fiction-generated inspiration, I would emphasize their role in concretizing an already formed dream.
It's a charitable reading of the statement, because narrative works can indeed plant a seed of desire to discover a particular place, and the guide then becomes the tool to transform that desire into a concrete plan.
However, reducing their function to this role is a limitation, as guides can be a primary source of inspiration and independent.
For example, a Michelin guide on Belgium does not start from fiction, but from the gastronomic reality of the country, inspiring culinary trips without any narrative prerequisites.