I haven't heard Toyota calling for developers to come develop for their platform, nor have I seen them using developers to create the usefulness that justify the price a Prius commands. A Prius is worth its price out of the box. IMO, the iPhone and the iPad would be worth much less than they are if not for 3rd party developers. Apple quite often uses the work of these 3rd party developers as bullet points to why you should purchase one of their devices. Without them, you've just purchased an $800 combination Movie/Music player and internet browser.
The word "entitlement" is thrown around as a negative, but in this case - perhaps yes - developers are entitled some amount of consideration from Apple. Note - I said consideration. Thus far, it's only been Apple's way or the highway.
There are two ways to write error-free programs; only the third one works.