yes kakashi isn't obito but that doesn't mean he can't go to the other dimensionKakashi is not Obito he can not just go into the other dimension. Also he had MS since he was kid, itachi was to quick for him to put up a defense
kakashi proved that he can use kamui on himself to go to and come from the other dimension
remember when obito warped kakashi to the other dimension ,kakashi warped himself so he was able to come from the other dimension
so if kakashi used kamui on himself ,he would go to the other dimension
kakashi had ms since he was kid but he didn't used its powers so you can't prove that itachi's tukimuyui would affect him now
itachi said non uchiha who has sharingan can't counter tuskimiyu, but he didn't speak about who has ms
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