Ask Apple, I'd only be speculating at why they didn't redesign their existing product to support it :P
But, since what they did for the Verizon iPhone has no bearing on what will appear in the iPhone 5, I don't really understand the point of your question.
But, since what they did for the Verizon iPhone has no bearing on what will appear in the iPhone 5, I don't really understand the point of your question.