Thank you for further attempting to explain your position. But as I stated in my piece, what "reason" does someone need to visit their place of birth? Please ask yourself that, instead of being distracted by logically irrelevant bureaucratic details. 

Perhaps the solution here is for CBSA people to ask whether the non-resident Canadian citizen intends to re-establish residence in Canada and if so, what goods he or she is bringing (not necessarily "returning") into the country. 

As for your point about the questions serving as an opportunity to avoid "an unnecessary examination," all I am trying to say is that the questions themselves are unnecessary and needlessly intrusive, given that I am a Canadian citizen, regardless of whether I am a resident of Canada. 

Please have a wonderful day, and thanks again for your interesting comment.