i cant speak for everyone but when i shoot im already close anyways. the few times i shoot, i do so from a clinch (usually). therefore, most knee strikes would hit me in the chest, it might hurt but probably wont stop me. for people who shoot from a distance, a knee probably would connect. those are the types of people that a kick might work, but i still wouldn't recommend it. i guess i should start being more clear on what im saying. sorry if i caused a confusion.