Honestly it's better if they don't ask for this at all. Some countries don't stamp anymore, and many stamps are completely unreadable or faded out. They have all the entries to Canada from CBSA, and more recently they have the exits too, it's just too burdensome to get these stamps translated, many of which are just completely illegible and the translator just writes that. It's a step in the right direction that they don't ask for it. Many people got approval without ever sending them. CBSA entry exit record is more reliable than these stamps, I think.Fair point. Still, it’s an online application. There is no extra paperweight to it. They can chose to check the bio pages only, or check all of it if need be.
It seems to be that those who have a lot of travel reported in the presence calculator, are those who are asked for all the pages. That might be a something to think about when submitting the application.
Then again, those who have zero travel might be asked to submit all pages to prove it.
In other words, it’s better to be proactive than reactive.
If you don't have that many travels, say zero, they see it by pulling the CBSA record, which they always do anyway.