Speed is King!

Walking into a rather ordinary-looking tea house, the trio ordered a pot of tea and a couple of pastries. While the dishes were coming, Li Chang Yin and Ke YiQing both glanced at each other, as if fighting over who would get the first question before in the end Ke YiQing let out a resigned look and lowered her head while Li Chang Yin let out a wide smile. Being a teacher still came with some perks! Clearing his throat, he asked, "Lecturer Yin, in the class before, you mentioned that a defense technique, although important, fell short when compared to a movement technique. At the same time, you mentioned that 'speed is king'. Although I've heard of this philosophy before, I've always had difficulty understanding why this was the case. If one's defense is strong enough, couldn't you just stand there and ignore any attacks, no matter how fast they might be?"