Safety Concerns
More "black boxes" = more safe flight ?
We will never know why but images may well help to explain why. Once we know why we can develop a safer system.
I doubt that .... in the end we only think we know why and still will address the same contributors.
We know the leading contributors now ... let's get on with putting the resources there rather than waiting to satisfying our last subjective doubts with video recordings.
Just look at the CVR, do they prove anything? or do they just focus us to consider possibilities?