I think that, like many people I have met, my Bob doesn't have a brain. Therefore even the most technically perfect strike I deliver won't give me a KO.
I'm with you. I can knock him over with kicks, sure, but apparently my hand techniques lack power, since I don't knock him over with them.
I'd like to see video from those who knock him over with their hand strikes, to see what they're doing that I'm not...