There was a part of one of Gemmell's Waylander series where Waylander was explaining that fear of consequences stops many people from acting.
That vid was an absolute classic case in point.
Any of those rails and holy concrete etc. I'd walk across any day of the week...if they were under 5' from the ground.
It's exactly the same activity, using the same set of skills, but I don't think any of us would do that walk without clipping on.