The cheapest version: a Google Forms survey on vacation habits does not directly prove the behavior of verifying identity documents.
It is an indirect observation, not an explanation of deep motivations.
To understand why 75% act in advance, a direct question about their reasons or fears would be necessary.
It's like deducing someone's good budget management simply because they pay their bills on time, without knowing if they have an emergency fund.
Without this information, we are content with a cliché, not actionable information.