Image manipulation has always been a thing, and there are ways to counter it...
But we already know that a shocking amount of people will simply take what they see at face value, even if it does look suspicious.
The volume of AI generated misinformation online is already too damn high, without it getting more new strings in it's bow.
Governments don't seem to be anywhere near on top of keeping up with these AI developments either, so by the law starts accounting for all of this, the damage will be far done already.