It depends on coordination.
While one rescuer monitored the patient, another could be responsible for the rope system.
Someone else might secure an anchor.
Another person could watch the terrain for falling rocks or changes in the ground.
Communication connects all of those roles.
A rescue team cannot operate effectively if everyone acts independently.
Every movement must fit into a larger plan.
That was particularly important on this hillside.
The man was vulnerable.
The rescuers were exposed to the same dangerous environment.