I rate the main assertion at a validity level of 7/10. Your point about the travel objectives is very accurate; it modulates the importance of these events. For example, I observe that the Olympic Games, despite an increase in prices of +150% for accommodation and a 95% occupancy rate in the Paris region, only divert a minority percentage of 10% of travelers whose purpose is to visit relatives or work, illustrating well this prioritization of personal motives over logistical constraints.