Yes, yes, I get it. A lot of people are making that claim, but its not quite what I'm asking. Of course normal people during Rikudo's era couldn't use chakra the way we see it being used now. The point of this thread was to question why Kaguya ate the fruit. I am simply making the claim that it seems more likely she was influenced into doing it rather than doing it on a whim. Who influenced her would be the only question, and as many pointed out, people could not use chakra, hence they couldn't use genjutsu. So this leaves us with few candidates for those able to wield such a power...but there are some.