My intuition tells me that this survey, although interesting, does not grasp the real reason behind the proactive verification of identity documents.
We cannot rely solely on planning habits; the explanation seems too simple for a much more complex reality.
Here in Spain, the cita previa system and unpredictable administrative delays push people to anticipate to avoid missing their flight, for example, a very concrete event.
The model of vacation planning does not hold if it does not incorporate bureaucratic pressure and the fear of delays.
To confirm this, one would need to survey people specifically about their past experiences with administrative procedures for identity documents.