Why is the iPad Virtual Pad so high?

Would it be possible to have it appear wherever the user touches the left half of the screen instead? That way we can define where we are most comfortable playing for extended periods of time rather than being forced to play a specific way.

With my left hand, I hold my ipad with the bottom left corner in my palm, it just works better for me and is how I've been holding portable devices since my LCD Burgertime game back in the 80s.