Respect to you Jon. I imagine it took some time to choose the wording.
I share your concerns about the potential for harm. This could be the main reason why it is taught only to the more experienced Kenshi (or at Summer Camp, where people can be monitored and assisted more readily).
We know what we are told. We decide whether to trust or believe based on our experience. Where we have a little knowledge, we trust those who we believe to be more experienced. When we begin to doubt... is when things start to get (more) dangerous.
David Noble
Shorinji Kempo (1983 - 1988)
I'll think of a proper sig when I get a minute...
For now, I'm just waiting for the smack of the Bo against a hard wooden floor....