I also found interesting that some of you quoted my provocative sentence 'For other attacks, like hand grips and attacks from behind, aikido is useless.'. I put it deliberately in the text to trigger a discussion because of widespread misunderstanding.
I find it interesting you seem to only have included it as a provocative statement. Are you suggesting you don't hold this view? How would you address the points raised directly?
Bear in mind that there are consequences of speaking provocatively, too.