There are SO many places in the forest, where if you stumble, you can impale yourself on a broken branch or small broken off tree, that I would think that this sort of thing would be important.
It just seems to me that you have to consider not just the likelihood of an accident, but also the consequences of the accident, IF, it happens...
It my not be likely, but IF it happens, it is IMMEDIATELY life threatening... And it is not like it is something that is VERY unlikely.
And if you have to be wandering around in the dark, it becomes MUCH more likely.
And if you are in an URBAN area after an earthquake or other disaster where buildings are destroyed, there is going to be re-bar sticking out all over the place for you to impale yourself on!