Re: Construction Safety
If a firefighter falls through the roof of a burning building, it's his own fault, then?
You can always play "what if" post-incident and come up with a million ways it could have been avoided. The hard part is recognizing the risk before the incident. So, a trained and experienced worker should be the safer worker than the newb.
If you want to get into designing in safety features into tools, look how jointer head design was improved to make them somewhat safer (less likely to remove entire hands).
Remove not the ancient landmark, which your fathers have set.