Who benefits from this emphasis on local events as a decisive factor in choosing a destination? It is often a narrative that ignores practical realities.
In Spain, travel dates are often dictated by school holidays or the availability of citas previas for urgent administrative procedures, not by a festival.
An event, even major, will not make a family with budget constraints move if it means doubling accommodation or transportation costs, like a patronal festival that raises prices.
The real incentive for most is to find a good value for money, not to attend at all costs an event that is not the main reason for the trip.