Charles Bergman wrote:
Shioda Gozo Sensei says (I'm paraphrasing)that these attacks mirror the movement, timing and balance of a punching attack, but take the fear out for beginners.
Now, I can't say I could do much with Katatedori, but I was once (on request) forced to the floor through this attack. Bam, and I was down.
So I think it can be used as an attack, but only by somebody who knows very VERY well how the body works.