What is a disadvantage of using a one-person drag/carry?

Using a one-person drag or carry can indeed tire the rescuer quickly, which is a significant disadvantage in a combat or tactical setting. When a single individual is responsible for moving a casualty, the physical demands of carrying or dragging a person's weight over any distance can lead to rapid fatigue. This fatigue can subsequently impair the rescuer's ability to continue moving, respond to threats, or assist other casualties, ultimately jeopardizing both their safety and that of the injured party.

In situations where prolonged movement is necessary, the depletion of the rescuer’s energy can compromise effective tactical operations and limit escape routes or further medical care. The one-person method may provide increased mobility for short distances, but as the distance increases, the physical toll can outweigh those initial benefits. Thus, while there are certain contexts where this method may be applied effectively, the risk of exhaustion and decreased operational capacity makes it a concern in high-stakes situations.