I think things are advancing more quickly than anyone expects. Also, regarding Star Trek, Data was actually built that way very much on purpose. His (older) brother Lore was perfectly capable of understanding those things, but he was evil and yada yada...

Not to go off on a tangent, but I want to live in Star Trek.

Edit. Also, even along the lines of the current AI remixing model, things can get very convincing very quickly. A parrot doesn't necessarily have to understand what it says, If what it says is still compelling to a listener, which is a separate thing.