I understand the concern that the lived experience of a friend could be the most influential factor in choosing a destination, and that is entirely valid.
However, we cannot ignore that travel guides have a more direct and often more structuring role than mere fictional inspiration or personal stories.
They provide concrete information on costs, transportation, and accommodations that are essential for planning, whether for the initial choice or on-site details, especially where mobile coverage is uncertain.
For example, to plan a hike in the Scottish Highlands, a detailed guide on trails and accommodations is much more useful and decisive than an adventure novel or a friend's account who went for a weekend.