Also I don't get why you are warning people who want to get their ATIP report. We are all aware that we need to report all absences but it's nice to have an additional source to run your own list by to check if you forgot something in your own list.
The topic is about anticipating an interviewer's questions when there are not stamps in the applicant's passport for some entries into Canada (and in particular for a PR who uses Nexus).
To the extent my posts constitute any warning, it is a well-warranted warning that PRs should keep complete and accurate records of their international travel, including to the U.S., and
NOT rely on any other sources to be complete, including government records. This is not complicated. The why underlying this warning or caution is simple and obvious, reflected widely in posts and in the official Federal Court decisions: a lot of applicants fail to completely and accurately declare travel dates, leading to non-routine processing, delays, even challenges and sometimes rejection. My sense is that second to problems related to not following the instructions and making mistakes in the application generally, the failure to completely and accurately report all travel dates is perhaps the next most common cause of problems for legitimate, qualified applicants.
Thus, again for the OP here, the core response to the query is that the OP need not worry about the absence of stamps, but this is largely dependent on the OP completely and accurately declaring all travel outside Canada, including day trips to the U.S.
(Explaining the background for why PRs need to keep such records, however, can be complicated, but mostly because more than a few discussions in this and similar forums have tended to confuse, understate, and in some instances even misstate the import of keeping personal records and reporting all travel dates accurately.)
As for the off-topic tangent about making ATIP requests, largely
unnecessary requests, I am reminded of another recent discussion in the forum in which an applicant (if I recall correctly, might be the same as the OP here) asked about notifying IRCC of a planned month-long absence which will be within a period of time when that individual might be scheduled for the test & interview. That applicant had been advised by her Canadian citizen spouse to, in effect, not bother IRCC, that IRCC did not need or want to deal with what would amount to a lot of extra paperwork if applicants gave notice of their holiday plans.
The spouse's advise is actually contrary to IRCC guidelines, which encourage applicants to notify IRCC of absences longer than two weeks (to assure applicants have sufficient notice to attend scheduled events). That noted, that advice was characteristically
Canadian, recognizing that many if not most Canadians are cognizant and conscientious about imposing
unnecessary demands on government services, in significant part in recognition of the cost to taxpayers. While Canada is a large country, it nonetheless has a relatively small population, a fairly limited funding base (there are, for example, at least two U.S. states which separately, each alone, have a larger economy than all of Canada).
There are a number of occasions and circumstances which do indeed warrant using the ATIP and ATI procedures for obtaining personal or general information from the government. So it is not as if I discourage using these procedures across the board. The extent to which the government is burdened by unnecessary requests, however, is widely apparent in this and other similar forums.
And, this is not to discourage requests by individuals who are conducting research, including for example obtaining such information for the purpose of expanding their understanding of these processes so that they can contribute useful information and share personal experience, such as in this forum or other venues (some participate in local community groups or organizations which provide support, assistance, or information sharing for immigrants).
But overall this and other similar forums tend to encourage
unnecessary, superfluous ATIP requests. While, again, sometimes these requests are warranted, important to make even, the vast majority of such requests reflected in forum posting provide little or no information the individual does not already know (or could easily figure out), and virtually nothing which the individual can actually use to promote or advance his or her application.
