Well said. I did use that phrase. I was not using it at you. It is what was on my mind from the beginning as to why everyone seemed happy with their seat belt methods. Was trying to explain none of the methods would solve the "worry". Piece of mind. A common phrase. I see what you thought. I did not think of that.
I get that people do things for piece of mind. I do that too. In this case, I wanted to point out that if that makes you put it "out of your mind" and move on, to consider XYZ facts. I hated to say that folks could be causing more injury, but that is also possible. I don't have a positive thing to say about it. Engineers are trained to be doubtful and pessimistic when it comes to examining a safety issue and it's proposed remedy. I still have that form of PTSD from the aerospace business. I wish I had a more calm and understanding attitude like you. I try not to be as "spicy" as a few others but I think I'm in that bunch. I was getting all into the life and death of it as opposed to all the other neat stuff we talk about.
Now Tim is going to shun me for the washer/cardboard analogy. I can't dispel an idea without explanation. That would be too spicy. Just trying to explain the depth of structural strength necessary for seat belts and seats. An opinion for sure.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn