Final answer:
The weak point is significant because it suggests areas where achieving a release may be easier, allows for victories with less force, and might make for a quicker success, although it doesn't guarantee a release.
Step-by-step explanation:
The weak point, as discussed in Sun Tzu's The Art of War, is important because a. it lets you know where it may be easier to try to gain a release. By identifying and exploiting the weaknesses of one's opponent, a strategist can achieve advantages with less effort and increase the chances of success. While using the weak point might lead to a quick release or breakthrough, b. its use doesn't always guarantee a release because situations can vary greatly, and opponents may reinforce their weaknesses. Lastly, c. using the weak point means you don't have to use as much force. This principle is rooted in the idea that efficiency in warfare — as in leveraging weaker aspects of an opposition — can lead to more effective outcomes than direct confrontation.