And if the traveler is alone, what protects us from the idea that the influence of companions is a necessary category in the process of choosing a travel destination?
It's a condition, of course, but not an inherent component every time.
The selection process should be able to work even without this variable.
Take the example of a solitary hiker planning an expedition in the Dolomites; the choice of his destination is entirely personal, without contingency related to companions.