Seeing this completely in action, Mijin Gakure is usually used as a death warp without exp lost or a very VERY quick way to remove weakness. In truth, A LOT of two hour abilities are without any real combat usage, but not without situational purpose. In short, deal with it.

Having a mangled cock skin waving contest of who's a better nin isn't going to help your cause if you're unwilling to accept any answer that is not what you want to hear.