We've seen this film before: just because a survey is conducted doesn't explain why people verify their identity documents so early.
The historical precedent shows that caution with travel documents is popular wisdom, passed down from generation to generation to avoid hassle.
People have historically anticipated these checks out of fear of administrative complications, long before a survey suggested this practice.
The idea that a simple Google Forms survey could 'inform' this fundamental behavior is a novelty without proof, and common sense dictates this, not a market study.
Think of the times when a passport or visa took months to obtain, like parents preparing their children's first trip abroad; this has always been the playbook.