why do people think that kabuto if super strong because of that?
It's just like toad sage mode, but that mode couldn't even defeat pain, so why do you think it's so freaking awesome?
because of it's name? and in dragon sage mode you don't even get tremendous powers like in toad sage mode...
just saying
Cause DSM is boss.
You can cover your eyelids to not be affected by genjutsu and find your way in battle without eyes, by using your sensing powers in sage mode and the way of the snake (tongue instead of eyes). Basically you counter loads sharingan dojutsu fighters their jutsus (and I cant stand most of those bastards xd).
Dragon sage mode and toad sage mode are both sage modes, but they are really different as well.
Just as Rock music and Jazz are both music, but really different from each other as well.
Kabuto has
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and
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2 Jutsus that are so Boss, that you need to write down jutsu and boss with a capital J and B

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Even before DMS, Kabuto was already pretty damm good. Tsunade considered his medical jutsus better, than hers in her prime. The scalpels that Kabuto can use in battle, are really large. He can cut almost anything with offensive medical jutsu. Combine that with his regeneration (even before he got Karin her blood) and his other medical jutsus (defensive to heal targets or his escaping jutsus with dead bodies) and that makes for some sick medical jutsu arsenal.