While you indicate that a survey of 78 people forms the basis to assert that 75% of people check their travel documents in advance, it is important to nuance whether this sample is truly representative.
Can we really generalize the behavior of millions of travelers from such a small and specific group?
For me, it lacks statistical reliability to make it a general rule, especially since administrative procedures, like renewing a child's ID card, can take weeks depending on the municipality, making anticipation mandatory for most families, not a choice.
Without knowing the composition of the sample, it’s hard to tell if these 78 people reflect the reality of families with children or single young adults.
This makes the data more of an interesting hypothesis than a solid conclusion.