It is time to set the level and recognize that a simple survey cannot explain the cause of a behavior.
The Google Forms survey gives us raw numbers, but it does not tell us why people act this way.
It is an observation, not a causal proof; without understanding the underlying motivations, the data are limited.
For example, the survey does not indicate whether the 75% early verifiers have already missed a flight due to invalid documents, which would be a concrete reason.