I disagree with the premise of the original linked article, though I value the warnings and suggestions (both here and in the article) regarding tool usage as important.
I contend the only lethal or dangerous tool in your shop is the brain you _don't_ use (the linked article alluded to this by listing "ego" as one of the 8).
The physical tools do certain things, and yes, they can break, but they only do those things with input from humans.
It's really the actions we take resulting from the decisions we make, that are the cause of injuries.
Here are some - in my experience - characteristics of actions, or conditions of people, or the work area, which have proven to be dangerous:
Carelessness
Hurrying
Shortcuts
Tiredness
Non-cooperation
Dehydration
Overheating
Spills, debris, parts, and tools left lying around in the working area.
Dehydration and overheating, to the point of danger - can come on very quickly, before we can recognize it in ourselves, if we're focused on a task. _Not_ taking steps to prevent the above is a decision made while lucid. Deciding to continue when the above is finally recognized in yourself is compromised.
There's only two conditions of the people making decisions that cause all the above characteristics:
1. Ignorance - the definition being: "lack of knowledge" about (or experience in) any particular subject; I'm ignorant about a lot of things, but I try to _not_ be stupid
2. Stupidity - "obdurate ignorance in the face of credible evidence to the contrary"
"Credible" is key.
The advice you get from someone who has "done this hundreds of times" but - for example - never read the directions is not necessarily "credible".
I initially listened to someone (who owned an auto repair shop for a few years) while I was trading heavy lifting, crawling underneath, and "wrench ***ch" work, for help with _my_ vehicle.
After talking to a young mechanic (who was professionally trained) about a technique I saw the older guy use, I never listened to him again without a skeptical outlook.
After that, he only caught me once when he changed position before I could react; I didn't see his first move because he was on the other side of his customer's vehicle.
I was initially ignorant.
But finding out how out-of-step he was with "best practices", I would be stupid if I had continued to listen to him as 'authoritative'.
He did understand the importance of jack stands. But I'm thinking that's because a mechanic in the town he grew up in was killed (~40 years ago) when he didn't use them. And I heard about it from several older guys in the same town, so it was notorious as well as local.
But he was careless about eye protection; strangely enough, he couldn't see very well. Hunh - imagine that.
I'm in a much better situation now. I get to watch someone who _really_ knows what they're doing.
