Half right, half overestimated: although local events can influence a destination, they are not always the main component of validation.
It's a valid concern to consider the impact of events, but claiming it as a constant subset of the overall process is ignoring the reality of some trips.
For a business trip to Dakar, for example, flight availability and security often take precedence over cultural festivals.
The common ground is to recognize that their importance is conditional on the purpose of the trip and the traveler's expectations.