I think parent was making a point that once this tech is in the hands of the common man, it's value for sophisticated players might diminish strongly. Same way as an undisclosed 0day in a high value target (say IOS), is extremely valuable. Once it gets disclosed and everyone knows about it, people can come up with workarounds and eventual fixes, rendering the threat basically defanged.
I'm leaning towards the same school of thought. I'd rather see this tech widely accessible and hence all video/picture material henceforth considered completely untrustworthy, than living in the misguided notion that video evidence is trustworthy.