Board Thread:Naruto Discussions/@comment-32617252-20180630010918/@comment-1512913-20180630060251

They do have actual physical bodies, it's beyond me why people still think otherwise. Just because characters in the manga said so? Kurama was also said to be a natural disaster, like the world itself getting mad at people or so, so I suppose that's canon too just because it was a belief of in-universe characters.

Most fans are unable to distinguish which statements are just opinions, beliefs of the fiction's characters and which are the author conveying facts.