What is the purpose of limiting the weight of filled bags?

Limiting the weight of filled bags primarily serves to protect porters and handlers from experiencing injuries such as strain or rupture while lifting and carrying the bags. Heavy bags can pose significant risks when handled improperly, leading to overexertion, muscle injuries, or chronic conditions. The specified weight limit allows porters to work safely and efficiently, minimizing the chance of accidents associated with heavy loads.

While other options touch on related concerns, they do not address the core reason for the weight limitation as effectively. For example, speeding up the handling process may be a benefit of optimal weight but is not the fundamental reasoning. Similarly, uniformity in size or concerns about disposal systems, while important in their own right, do not directly relate to the health and safety of those tasked with managing the weight of the bags.