I don’t have a stock of incredulous pics, sorry
I’d have thought* that a 26″ wheel would be more easily deflected by a given lump than a 29″, and so wider bars might help the weak of grip to control them to a greater extent with little wheels
I’d also have thought** that most “turning” should be achieved by leaning rather than, err, turning and so that aspect would be moot
Furthermore, I’d have thought*** that the height of the bars above the ground just might be the most relevant meausrement if you’re doing mental geometry
* ** *** I don’t waste my time thinking about that shite. I have moderately narrow bars because I ride between trees & gorse bushes now & then. They’re ones that I’ve cut down after learning something – that was that my knuckles hurt because of proximity of local flora rather than lack of control. If I was going to ride DOWN an open hillside at balls-out speed without riding between trees/gorse to get there, I’d probably have wider bars