So because you can think of relatively few cases where key figures were duped, it therefore must not be a problem? That hypothesis fails to account for the rest of humanity.

I have a friend who believes in aliens. They showed me a video that someone had put together of "footage". They were seriously showing it to me as evidence, to convince me that they are real, based on this video. I was shocked they were so serious - and having a hard time containing my laughter.

I later found a number of other videos debunking the videos and clips that video was based off of - but my friend still believes in aliens, based on those videos. And this is someone I regularly have "intelligent" conversations with.

This change, the ability to put words in someones mouth, is the next photoshop. And it WILL have consequences to it, good and bad. And we are not prepared for that, as a society - we haven't gotten over photoshop yet.