What you are saying makes no sense at all, no company needs to change their policies for anyone or anything. The App Store is only a sales medium and should follow the rules stablished by who created it. If the dude who owns Toys R Us created a rule that his medium only sells toys and not beer, beer makers should not be mad at it and try to sue the store.
Apple is not the sole smartphone manufacturer in the world and no one is obligated to be an iOS user, pretty much as no one is obligated to buy a car from any specific store. If someone created a car that only runs on it's own fuel/roads/highways, it's their problem lol. In Apple's case, everyone wants to own an iPhone even if iOS is not open sourced and doesn't run on third party hardware, so kudos to them