Even this corporate shill website lists 'high' amounts of theft with "According to some industry data" as "an average-sized food retail store in Canada can have between $2,000 and $5,000 worth of groceries stolen per week"
So not only are those inflated numbers, that's still a tiny number. There are about 15,000-16,000 grocery stores in Canada. Even if every single one of those lost 5000 per week, that's 3,900,000,000 per year. They make over 9,000,000,000 per month - or 108,000,000,000 per year.
Even at their highest possible (and likely lying) numbers, that's 0.0361111111111111 % lost to theft.
Sure, some hyberbole, but barely. (And I worked at Costco and saw their theft numbers, and even they have laughably low ones.)