Before we arm-chair critics throw too many stones in this incident, the B'Hawk blade design does have some very well thought out features making it a fantastic utility machine....combat or peacetime.
As mentioned in UH60 Bad Blade
UH-60 with "bad" rotor blade Dixson sheds some additional light on the original design concepts and considerations worth reading. Fortuitously, this thread has just surfaced yet again on another issue for ease of reference just below.
I think some of these design features do need to be considered when flying our machines...this is one of the many elements euphemistically called "experience" but so many people fail to understand...its not all about the number of flying hours necessarily, but what you understand about the machinery you are flying and responsible for. In many of our careers we are called upon to make "valued judgments". It used to be called "captaincy"....a concept which seems to be disappearing into the distant past as we seem to be overtaken be the need to fell more trees to create an A4 "risk assessment" sheet before every flight.
The B'Hawk tip cap is a very light composite structure providing an aerodynamic cover and extension, almost 12inches out from the main blade structure and in particular, it's span tip weights. It is quite conceivable that the tip cap could well have been shattered and flailed in the slipstream, making that ever familiar whoosh/whoosh or slap/slap sound that those of us who have experienced - or the rest of you that will experience it, will hear when you pick up a plastic bag/material or palm frond or other soft material on the blade. It certainly sounds like it on the video sound track...quite impressive.
If the Tip cap is simply shattered and flailing in the slipstream, it is quite conceivable that there would be minimal change in lateral vibration - even if the Tip cap disappeared totally. Providing the main structure and in particular the span tip weight package was still in tact.
You will notice the B'Hawk tip cap is attached with quite a number of flush screws to the main blade structure. See the link below and see a more detailed picture of the blade and tip cap structure. Note the extend the Tip cap extends beyond the main blade structure. The link below may shed some light on both the tip cap and the effects of rotor blade balance.
https://www.rwas.com.au/blade-balancing/
Perhaps going lower and completing a landing in situ would have resulted in far greater and more catastrophic damage,...difficult to say from the camera angle and field of view presented in the video.