On a scale from 0 to 100, the statement that local events are a always major factor in destination validation seems overestimated; I would rate it at 40.
The weight of these events varies greatly: for a tight budget, it can be a constraint at 80, while for someone seeking maximum flexibility, it's a 20.
The real question is the purpose of the trip, as this can shift the influence of local events from 70 to 30 points on this scale.
For example, hotel prices multiplied by five during the Super Bowl in the United States do not prevent fans from going if their priority is to attend the event, relegating cost to a secondary factor.