Why did Yoren not just turn over Gendry when faced with Amory Lorch’s preponderance of force? I get that it violates the legal norm that the Night’s Watch is immune to other jurisdictions, but isn’t the #1 priority of a wandering crow to maximize the number of bodies he gets back to the Wall? Surely picking fights with the bannermen of major lords is a suboptimal choice from a utilitarian perspective.