Enough theory, we need to define the order: inspiration from fiction is a trigger, yes, but it is the tourist guide that really allows you to "size" the trip.
A book or a movie can put a place on your watchlist, but how do you make reservations without practical details, concrete itineraries?
Without a guide, it's like trying to plan a network installation without technical sheets; you can't validate feasibility or steps.
For example, The Lord of the Rings might make you want to visit New Zealand, but it's the guide that tells you which national parks to visit, where to stay, and how to get there without internet connection.
Operational data are needed, not just a romantic vision, to move from desire to action.