Did Percy Pilcher and the Wright Brothers know about the Boeing 747 when they pushed off into the ether supported by stick and string? Of course not. It was real wing and a prayer with no real end target other than striving to achieve. And, heaven forbid, they self promoted and so we know about them.
PA, what you fail to realise is that this thread is trying to prevent JP ending up the same way of Percy, who didn't have a load of people warning him of the dangers that lay ahead. Percy, you may like to note, died demonstrating his flying machine to potential sponsors. (Cheese slices again!)
The Wright Brothers learnt from the gliding experiences and designs of Otto Lilienthal who died in a glider crash, and don't forget that the first person to die in a powered airplane crash was a passenger of a plane piloted by Orville, Lt. Thomas Selfridge.
I don't think this thread is having a go at anyones self promotion, it's highlighting that issues will present themselves along the way, where lives may be put at risk. In JP's video, he says that if he saves one life it will all be worth it, I'm thinking that if this trial doesn't go ahead, potentially there's that life saved.