Who's Afraid of Android Fragmentation?
Nerval's Lobster writes: The dreaded term "fragmentation" has been applied to Android more times than anyone can count over the past half-decade. That's part of the reason why game developers often build for iOS before Android, even though Android offers a bigger potential customer base worldwide, and more types of gaming experiences. Fortunately, new sets of tools allow game developers to build for one platform and port their work (fairly) easily to another. "We've done simultaneously because it is such a simple case of swapping out the textures and also hooking up different APIs for scores and achievements," London-based indie developer Tom Vian told Dice. "I've heard that iOS is a better platform to launch on first, but there's no sense for us in waiting when we can spend half a day and get it up and running." So is fragmentation an overhyped roadblock, or is it a genuine problem for developers who work in mobile?
You are confusing market share with profit share.
It's been shown in many studies that the vast majority of android users do not buy any apps and are mostly on low end devices that wouldn't be able to play the better games anyway.
That's the real reason why devs have an iOS first approach.