Well... That's actually probably fair as stated.
BestBuy etc don't sell Apple's products on commission, they bought them from Apple for a wholesale price, they've got them in a warehouse and on shelves right now on their dime, and the only way they make that money back is by selling them.
And the only way Apple makes money from a product being sold at Best Buy is that Best Buy will likely buy more stock to replace the stuff they sold, and they'll buy that from Apple.
So if it was banned everywhere it would be unfair to the retailers that already paid Apple for a product they now can't recoup, and it wouldn't impact Apple at all because they already made their money from Best Buy.
This way the retailers can get their money back, but can't get any more, which means only Apple is impacted.
The only other way that's semi-fair (but would be extreme) would be for Apple to be forced to do a recall or something and reimburse all the retailers the money they had already spent. Doable, and definitely more of a punishment for Apple, but a lot of extra work for everyone if the outcome of this is that Apple settles and then everyone can just go back to ordering more again.
You're not alone! This concept is called Liquid Democracy