I find it worrying to witness such confidence when compared to what I've seen of the reality of being delayed.
There, I absolutely agree with you. I know that I can't prepare for everything.
In respect of your "traffic queue with captions" picture, I can't show you the picture I have because it's burned on my brain and not stored in any camera.
My sister, in her teens, fell from a two metre ladder onto concrete and hit her head on a garden wall on the way down. The picture in my head, the visual memory, is of her intubated and on a drip in an induced coma, her head bandaged and her face bruised. The emotions I felt back then were gut-wrenching terror that she might die and fear that she might be brain-damaged. She still has some hearing loss in her right ear and has gaps in her childhood memories.
This girl on the M5 bridge fell much further and is almost certainly more badly injured. Her family will be as terrified as I was. She will almost certainly have lifetime sequelae. If she jumped, she already had significant mental illness in addition to the injuries she incurred and her family will be wondering what they did wrong and what they missed, guilt on top of terror. I cannot, with my own memories of my sister in my head, feel more sympathy for people who merely got hungry and had to pee into an empty bottle than for this girl and her family.
My sister was transferred from our local A&E to a specialist head injury unit, on the other side of a river. A delay in traffic would have risked her life, so I understand that delays can kill. To prevent that risk, the bridge over the river was closed to all other traffic whilst her ambulance crossed it. I imagine that closing the bridge meant that a lot of drivers were pissed off that day too. Tough, someone was critically injured and needed the bridge more. The same was true on the M5 yesterday.