The least expensive version: the idea that local events are always an essential component of validating a destination is too rigid.
For many travelers, the main goal is not to participate in an event, but simply to relax or change scenery, which makes local manifestations a burden or something to avoid.
The minimum viable for validating a destination depends on the traveler's intent, not an exhaustive list of everything happening there.
For example, for someone just looking for a week of rest in a bungalow in Zeeland, local events are sources of crowds and high prices to avoid, not opportunities to plan.
It's an additional cost if you have to actively avoid them, rather than a value-added.