Right.
Now demonstrate how you own a copyright to "goes to a planet".
Copyright laws, like most laws, are not incredibly simplistic but realistically in this case... it is fairly straightforward and it only went on for so long due to lawyers keeping it going.
The World Wildlife Foundation had a copyright on the abbreviation "WWF". The World Wrestling Federation used the abbreviation as well. They meant different things, but the World Wildlife Foundation was able to demonstrate it had created first and owned the intellectual property.
In the same world, the World Wrestling Federation violated Marvel Comics copyright by calling Hulk Hogan "The Incredible Hulk Hogan" (which they settled out of court).
Now prove to me how x writer has a copyright on "goes to a planet", that they created that unique phrase and concept before anyone else did and they own the rights to the concept of "going to a planet", or more specifically, the usage of "goes to a planet".
I don't have a copyright on the phrase.
I have a copyright on what I wrote.
And AI works by literally copying what I wrote and putting it elsewhere.
If the programmer writes "going to a planet" and puts it in the AI to draw from, that's ok. If the programmer puts my book, which has the phrase "going to a planet" in it, and the AI copies that phrase out of my book, then it's not okay. That's the core of intellectual property.