Per this document, citizens of countries with agreements with Switzerland cannot cash out Pillar 1: "Social security agreements mean that pensions from the OASI/DI [Pillar 1] are also paid abroad. For this reason you cannot apply for reimbursement of your accumulated OASI contributions... when leaving Switzerland" (Page 13)
Basically, because you will get Canadian social security (Old Age Security) and because of this agreement, you will not get it.
https://www.bfm.admin.ch/content/dam...zialvers-e.pdf