From a retailer perspective, the article surely makes sense, given these margin numbers are right. However, we all know the electronics retail in general is dying, even bigger retailers like Bestbuy are struggling. The future is online and wether your nostalgia likes it or not, this is where the market is ultimately heading.
From a customer perspective, what's the problem? Getting overstock items for $1000 less (like the R5 rebates we seen last Black Friday) is great, with 1 year warranty even better. I honestly don't care if that hurts retailers who sent gear back
The article sounds to me like the author is siding with retailers because he's mad he paid the full price.
From a strategy viewpoint, it makes a lot of sense to discount items by so much. One reason for instance, you got Sony selling competitive gear with EDU discounts or cashback, that Canon doesn't. But the R5 and R6II are simply overpriced regarding their direct competitors (A7RIV, A7IV, Nikon Z7II, Z6II) and that's not even counting discounts. And I know this and that spec differ and they dont shoot 30fps or whatever, but it doesn't change the fact that they are direct competitors for the generic Bestbuy customer. Who just looks at the megapixels and if they can do 4K video.
If Canon wants to remain No 1, they have to continue fighting for the customer, not for the retailer.