How do we know that's what they haven't done already? If they have been genetically manipulating us as seems suggested as the official line, then we have absolutely no idea what their intentions are, nor what they are capable of. If they have been doing this since time immoreal, then that is already a "reality" for us, and we would have no idea about it, since we don't know any different!In other words, we might call it the "central paradox" of Ufology:
Considering there are entities more powerful than us and who've been interacting with us for millennia, why does it seem they haven't dominated us Already?
How are we supposed to verify the "goodness" of non corporeal beings who won't provide a straightforward bloody answer to basic questions? Why don't the good guys make it more obvious who the bad guys are? Why don't they act straight forward? I have an answer. They want to manipulate us to their own ends.
It makes me INCREDIBLY suspicious that we are ultimately left to interpret any communication with the others, because that opens up the potential to manipulate those of us who think we are all one, for example.
Yeah guys, do you remember WW2 and the holocaust? Or other acts of barbarism throughout history?