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When the angle between the load line and the lead line becomes too drastic, the efficiency of the hoisting system decreases. This is primarily due to the increase in the amount of force required to lift the load at a sharp angle. In hoisting systems, ideally, the load line should remain as vertical as possible to minimize the mechanical advantage lost due to angular constraints. A drastic angle introduces additional stress and can often lead to greater friction and complications in movement, which translates to a loss of efficiency. Therefore, the performance of the hoisting system in lifting the load is compromised, making it less effective.

Maintaining optimal angles in hoisting systems ensures that the forces are efficiently directed, thereby preserving the system's mechanical advantage and overall efficiency.