>>41068928 (OP)
Because people always ever say what they think it is without doing the actual debunk. In that case, that would be having to create an animatronic puppet with servo - controlled facial "muscles" and so on, extremely expensive and obviously such a gargantuan undertaking, nobody would ever do it.
I highly doubt faking these videos is profitable. Unless you can show how putting this (and skinny bob) on youtube somehow generates the millions of dollars it would have taken to create the hoaxes.