Approval of the method: the idea that tourist guides are just a sub-part of fictional inspiration seems to ignore the jurisdiction and autonomy of these tools.
Guides are often the primary source of the desire to travel, especially for less glamorous or culture-focused destinations, without a book being involved.
Here in Spain, for things like the Camino de Santiago, the guide is the mandate of the trip itself, long before any literary inspiration.
There must be conformity with the reality of travelers; guides are a starting point for many plans, not just a supplement.