Not only did Li Fan slay those monsters, but he also managed to grasp a bit of the principle behind the compass.
For instance, when he was scouting in the clouds, the compass still pointed toward the direction of the northern demon spawn. This indicated that the Fei Mountain mine had little 'fate' with Li Fan.
However, once he had killed all the monsters, and their possessions became unclaimed treasures, the spoon immediately started to wobble and flutter uncertainly—the 'fate' arrived instantly.
It seems that opportunities indeed need to be seized. Look, if you encounter one and do nothing, it's not meant for you, but be a bit proactive and assertive, and everything comes your way. As long as you have the might, your opportunity becomes my opportunity, and my opportunity remains mine.