Its very easy to add makeup and create latex masks for people that don't exist, and they look, somewhat convincing on camera the further you move from the persons face the harder it is too look real on camera. (human faces that is. We accept realism of an alien/monster/zombie much easier since our brains aren't trained to recognize them things so far out of bounds.)
Its not nearly as easy to add makeup to someone in order for them to look like another existing person in a way that is convincing, accurate, flexible, consistent, and skin tight.
There is no empirical data which can withstand scrutiny showing Biden is fake. (which seems to be what the title is eluding to)
Weird how you only pop up to Ree about the idea that Biden isn't a double when this post didn't even mention Biden.
Weird how I wrote why in my comment