[throwaway22032]

The timescales matter as well.

You or I could perhaps, if we dedicated a few years to it, make a convincing fake video of an acquaintance of ours doing or saying something. By the end of those few years it'd likely be out of date or maybe just irrelevant. And they'd have to have really, really upset us in order for us to put that much effort in. It would literally cost us tens, hundreds of thousands or more in opportunity cost.

Contrast that with some sort of tool that's not too far advanced from current image/video generators that can just do the same in a minute by typing "A video of my next door neighbour accepting cash in a briefcase from a man in a suit".