People keep on forgetting that the not them makes subtle changes and not full blown race changes (it’s funny yes but not accurate)
Like the episode where a girl’s mother got eaten by the not them she talked about how it was only subtle changes like changes in the way she smiles, her hair is curlier and she sounds slightly different
It’s enough of a change that you can tell it’s not the same person but also enough that it can really easily manipulate people into believing it’s them