Spiderman:
1. Long-bridge acceleration doesn't need to be as high to reach the same tip speed (firm shots). Perhaps error at the back hand might actually be greater on some firm shots, if taken using a short bridge, because of the snappy acceleration required. Though the short bridge would divide down this increased error, I could still imagine a net loss in accuracy.
2. Level cue: Some players with large or inflexible hands have more trouble getting their bridge height down. Moving the fulcrum back would reduce the resulting "tilt" angle.
3. Sighting: I personally like being able to clearly see the "forward" portion of my shaft during warm-up strokes. I could imagine this being hindered if you have both a low stance and a short bridge.
dr_dave:
4. Some people feel more natural and comfortable with a longer bridge and stroke.
Bob_Jewett:
My experience is that most players can get plenty of power with a much shorter bridge than they usually use. Also, for players with long bridges watch how far the tip comes back on their backstroke. If it does not come back to the bridge hand or pretty nearly, the bridge is longer than it needs to be (unless you want to make some kind of pivot-point, BHE argument).
Colin_Colenso:
1. Corrects errors in stroke on many shots due to pivot point characteristics.
2. Visually gives good look at cue line.
3. Allows smaller adjustments in alignment for the same amount of bridge adjustment.
4. Allows more fluid stroke. (mainly helps for speed control)