Board Thread:Naruto Discussions/@comment-25212736-20140722185642/@comment-5407586-20140722191017

While I still think it's "just because otherwise Obito would've been undefeatable", I think I can try to explain it. Madara could "teleport". Obito couldn't "get intangible". While it's true that Obito's intangibility is based on "teleporting to the other dimension only parts of his body that would otherwise be hit in the real world", it may be that as the Ten-Tails jinchuriki, the power in his body was way too much to be split between dimensions, and as such Obito was unable to get intangible.