**** happens. You can sit here with hindsight and pick apart what happened. And that's actually a good thing for us all to do, to learn vicariously.
But it's not reasonable to attempt to assign fault when you have multiple views of the tape, hours to reflect, and already know the outcome.
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You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.