In broad terms, a product being 'Canadian' may be a factor to consider, but it is not the only one, or even the most important, in most cases.
For myself, the first thing to look at is the product itself, both that it is something I need/desire, but also something that is well made.
Beyond that I want to consider, where practical, the ethics of how its made, be those environmental or the way workers who made the product were treated.
But I don't want to overstate the case and suggest I perform endless research on every purchase, I don't.
I consider what I know; and do additional research on major purchases from time to time, or a retailer or product that has given me cause for concern.
If a product gets past all that, then if all other things are equal I'd be more than happy to direct my spending at a Canadian product.
There are areas of retail where this happens more, and others less.
For example, I've come to favour Ontario-produced salad packs of greens.
I've discerned, if nothing else, the shorter shipping time in a cooler climate means the packs arrive fresher and last longer.
Unfortunately, none of the Big 3 (Loblaws/Sobeys/Metro) have yet put a local maker on the shelf.
But Big Carrot, Fiesta Farms, Whole Foods, McEwan, amongst others have.
There's the case of a very pragmatic reason (quality/product lifespan) being tied directly towards where its made/grown.