Then stop whining Opher and offer some advice that will apply to subject rather than picking apart a suggestion to look somewhere else beyond the flurry of punches?
Maybe I have been examining books that are too old, practices of the 1940s - 1980s, out of step with these modern aikido classes?
If you have read self defense by many of the top practitioners, then a kick to the knees is in every style you have practiced, including Aikido?
Interesting ... I haven't seen that used in any Aikido class or seminar in the last five years I have been to? I will have to get about a bit more to see where I have missed that practice?
Meanwhile, how about answers to the question, eh?