Who knows. But if I had half a bain I might say it's because it's "COPYWRITED MATERIAL" like you said. Perhaps if you had the other half of your brain you would want to know.
Since I couldn't say it better myself, I'll just repost what Heyworth said:
"You miss the point. If it's false, a forgery, a slander upon Scientology, why does Scientology claim to have the copyright? By claiming copyright, they are claiming authorship."
You are saying the Xenu story is not true, yet Scientology admits it is true when the claim copywrite.
They did everything they could to keep that nutty story from seeing the light of day, but by suing those people, the documents they sought to protect were entered into the court files, and when those files were unsealed, EVERYBODY could know about Xenu. And the scam is unveiled.
You've got a point. But that is just another way of turning attention away from that fact that the church is having illegal things done to it. So what if it is true. That doesn't change a thing, it's still illegal.
I don't nescessarily believe it but I haven't done OT 3 and respect that they hold it confidential.