You are right about that. A trekking pole self arrest can save your life. it did for me even if it was not the classic textbook method. I fell and started to slide down a hill and was able to get the pole dug in enough that I was left hanging solely by my right hand wrapped through the pole strap. I was unable to stabilize myself and get my hand free. Fortunately a person who was with us was able to help assist and free me. Had I been using a wooden walking stick or hiking alone on this trip, the outcome could of been a lot different.

Here is a photo of the lower section of the pole which I have since replaced. Though it is difficult to see in the photo, the section is very kinked and cracked almost all the way through. It probably would not of held me much longer that day.