Yeah. I just read that part back and it reads weird.
Let me try to explain by an example. Let us say a student has a wrist injury and we practise aihanmi nikkyo. This could be bad for a 'normal healthy' wrist, but an already injured wrist might be permanently damaged.
When I would intentionally execute the technique at normal speed, disgarding aite's injury and something would indeed happen to the wrist (break it, tear tendons) I would be liable. I clearly disregarded the known injury and put aite in unnecessary real danger. This is not what Aikido practise is about.
Still don't see that as an example of putting in harms way. I see that as acting irresponsibly. Why do Nikkyo on someone with a bad wrist?
That's not putting them in harms way that's blatantly being inconsiderate and brutal and betraying the students trust.