Point taken. Some games, though, could be accessible if not for the way the UI was implemented. For example, repackaged text adventures. I downloaded the Lost Treasures of Infocom app for iOS, and it was completely useless with VoiceOver. Presumably because the dev at Activision who was working on this packaging used the same kind of UI toolkit that they always use for games. The same goes for turn-based strategy games, if it's feasible to provide text for all the graphics.

Accessibility for games is definitely a much lower priority than accessibility for applications that are used in business, education, and everyday communication/social networking. Still, a blind person can feel excluded if their friends are playing a game that they can't play. Sometimes a given game can't be made accessible without changing the whole game mechanic. But that's not always the case. So, something to consider.