If I understand correctly, you claim that local events are a determining element in choosing a destination, to the point that they should guide our research.
My nuance is the following: they are an important factor, certainly, but not always the main or most stable.
Events can transform a stay, but their impact is often conditional on the traveler's motivations.
For example, for a traveler seeking tranquility in Avignon, the festival could be a disadvantage, regardless of its scale.
The importance of events depends on specific motivations and not on a general rule.