You made a point about returning from a limb walk and having the friction hitch away from you with an anchor bridge system or an extended bridge or other and I can see the benefit of not being able to pull down on the hitch out of habit. But, and I'm sort of thinking out loud here, what about if you run into a problem, for example, a deep handsaw cut to a hand, or a number of bee stings, while your bridge is extended. You would be left with one good hand to pull up to your hitch and re-attach it to your harness before you could descend to the ground for first-aid treatment. Unless I'm not understanding the anchor bridge system fully, this is not possible, to re-attach the friction hitch directly to the harness with one hand, or at the least, not an easy task.
Now the likelihood of this happening is no greater than while you are foot-locking up a static doubled rope, but in either case you would be left in a compromising position with a difficult descent ahead or a rescue required.
Is there something I'm missing about he anchor bridge system that prevents this scenario?
Thanks, Russell