The idea that local events are always a major factor in destination validation is a simplification; their weight is often conditional and depends on the traveler's objectives.
An event can drastically influence the atmosphere and costs, but for many, flexibility is king and other priorities take precedence.
In Senegal, for example, Tabaski increases prices, but if the goal is to visit family, the event is managed as an uncertainty, not a criterion for destination choice.
The real question is the purpose of the trip, because the search for experience is different from family imperative.
There is a fair balance between avoiding crowds and the obligation to travel.