Let's first establish, then judge: the link between vacation planning habits and identity document control falls into two distinct categories of analysis.
The Google Forms survey provides data on the "what" (75% verify in advance), which is an observation, but does not explain the "why".
To understand the deep motivations, a specific qualitative study exploring concrete factors like the fear of delays at the airport or administrative complications would be needed.
Confusing a simple correlation with a causal explanation is an error of taxonomy; for example, the survey does not tell us if the 25% who prepare at the last minute have more real problems at the airport.