I hope that those still immersed in the profession (regardless of experience) will read this thread atleast once and understand that you can never drop your guard...not for one second - not when you're in the driver's seat.
Perhaps I am way off the mark, but a lot of the nearly 500 posts to date suggest PB was distracted in time and space and his SA desserted him when he most needed it. Blink and you're gone. RIP.
Interesting take. I have an idea that the AAIB may be looking into two separate concerns. (As Mr B was not on an IFR flight plan ...)
a. You can't avoid what you don't see. Per your thoughts above, if the attention was diverted inward, how does one produce the evidence to support that line of inquiry?
b. You can't avoid what you don't see. If attention was outwards, why then crane not in sight, and avoidance move not made? How does one produce the evidence to support that line of inquiry?