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I used to work for the New Zealand Immigration Department. Immigration forms can be difficult for people to complete, there were no deliberate trick questions but there were a lot that people failed to answer or answer adequately. Most countries have a few streams of immigration, spousal/family, economic/skilled, tourism, temporary work. They also tend to have long term/resident and temporary or short term. Often there are rules that get applied and the visa officers have very limited powers of discretion.
Applicants will be assessed for health, criminal record etc and then if they meet the criteria for the type of application they are making.
Most countries treat citizenship as an entirely different thing.
It can be frustrating when there are loopholes that allow people through or weird barriers that make certain applications particularly difficult.
Do you seriously think that someone sits down and thinks 'lets make these citizenship application forms as difficult as possible' to catch people out ?