Someone earlier posted a Gif of Messi shifting the ball from his left to right and moving off from his right.
Which is often what Iniesta does. Shifts it to the left before quickly moving it back to his right to carry on.
2:55 - where's his left foot there? And he loses the ball as a result. The rest of the video, it's minimal left foot (sometimes to his detriment)
I know it's just one video (the first I found), but the way you're hyping his left foot, you'd expect to see more of it.
I've never seen Iniesta dribble at speed from the halfway line to the 18 yard line with equal left foot (or even more than one or two touches with his left)
I've seen him do plenty with just his right though.
He's less reliant than Robben, Messi and Silva - but he's very much right foot.
To say he's equally as good with both feet just isn't true.