Wait, so you actually held the iPhone? Why did you switch hands? Because you are right-handed?
No, the iPhone was just an image. It would be cool to evoke a ball of fire in my hand, though!
I switched hands because My right hand seemed more "Te" to me and my left seemed more Fi. Perhaps it's because Te is stronger for me. Anyway, it's just a thought-experiment/meditation, so I doubt it matters much which hand, so long as it works.
An argument is two people sharing their ignorance.
A discussion is two people sharing their understanding, even when they disagree.