If this person places their hands at their sides, the speed at which they block will be much slower than in the first scenario, thus getting hit by the opponent.
This is exactly how it is in fighting; you wouldn't see any boxer with their arms hanging down during a match, that's foolish behavior.
Yet at the moment, Wang Longhu is doing just that.
Lin Zhengzong observed for a few seconds, swiftly rushing to the front of Wang Longhu, his three fingers hooked, and stabbed towards Wang Longhu's sides.
Wang Longhu remained calm, his left hand drew back, using his fist's momentum to shake off Lin Zhengzong's move. But at the moment they made contact, Lin Zhengzong's technique swiftly changed.
Both hands grappled Wang Longhu's arm and pressed it downward, then the back of his right fist lifted and swiped towards Wang Longhu's temples.
Wang Longhu raised his hand to block, but Lin Zhengzong seemed to have anticipated this, turning a feint into a real move.
