Whether that's true or not is irrelevant if it's defined by law differently. Even without case law and precedent you'd still have to test it in court, which for libel can be prohibitively expensive.

For clarity I'm not agreeing or disagreeing, but what means sense to the layperson (including experts in a particular field) is sometimes at odds with what the law says.

I'm curious as to how you would prove that it would be impossible for any resource accessible under a given DNS domain to ever cause harm to anyone else.

Isn't "oops we made a mistake" actually a valid defense to libel in most US states? I thought you had to prove it was intentional to some extent? Or reckless/negligent IANAL