mmm - strange. I think if you're prepared to face a live blade, you should be prepared for some damage from hands and elbows.
Who said anything about being prepared to face a live blade? I sure am not -- and I'm pretty sure that most (sane) people out there would say the same thing.
Also, I'm not studying aikido to be prepared for some damage from hands and elbows. I'm actually studying aikido (amongst other reasons) to avoid and prevent any damage to myself and my loved ones, be it from hands, elbows, feet, knees, etc...