Me: I want to sell my stuff in your building and pay rent.
Apple: Sure. Only rent's a percentage, not a flat monthly fee. Also we're opening a new store in the same building that sells the same stuff you do but doesn't have the rent overhead 'cause we own the building so we can undercut the **** out of your business.
Me: wait
The rent argument doesn't make any sense. Malls charge all their storefronts rent. Malls do not also open up their own stalls with the same product as their stores after noticing how successful those stores are. Apple does this regularly. They definitely have a case for a very flagrant conflict of interests here.
You're right the comparison to rent is wrong, it's more like a store (maybe an...App Store?) where a portion of the payments made have the vendor take a cut.
If we go down one step further, the stores in those malls will quite often take a cut of the merchandise they are selling (their markup) and many stores will sell not just products from others but also will sell their own in house developed merchandise. These same stores may also refuse to carry my merchandise if they don't think it's going to sell either. You can pick plenty of examples such as grocery stores that offer their own branded products along side product they sell manufactured by others.
If you don't want Apple to take a cut, don't sell in their marketplace.