First, context: a simple online survey cannot alone explain why people verify their identity documents so far in advance, because administrative realities vary locally.
In Spain, for example, the culture of cita previa for official documents means that even advanced planners may find themselves at the last minute due to delays imposed.
It’s one thing to want to be proactive, it’s another to be able to do so when the administration sets appointments months in advance.
The survey may capture intent, but not the ability to execute faced with regime constraints.
For renewing a DNI or passport here, you may be forced to wait weeks for an appointment, regardless of your good will.