Really not seeing the problem. A larger wheel would require more leverage, isn’t this obvious?
Not really, it looks like common sense on paper but in practice the forces used to turn a bike are small and the difference in gyroscopic force isn’t that big (and a light 29er wheel can be a weaker gyroscope than a heavier 26er). And far less than, say, a motorbike wheel weighing 15kg and spinning several times faster, which you turn easily with similiar width bars.
Longer bars make it easier to resist turning forces (ie, bouncing off a rock, getting caught on a rut) and keep control, but that’s not wheel dependent for the same reasons. I suspect that actually, bigger wheels should need less force to keep them on track because of their better rollover, but it’s a small difference.
Another difference is just the impact on default riding position, they force you into a more open, elbowey stance and usually encourage good weighting etc. Which doesn’t change geometry but changes outcomes of geometry, the wider the bar the longer the effective reach