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Both of these jutsu have their own pros and cons with their capability so it isn't the same. If I were to go with this logic I could say that any jutsu, related to each other, could always changed into another jutsu mid way. Water Clones using its body as water source actually makes sense, based on its priorities stated[
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] so I have no idea why you would use a clone jutsu as an example, honestly.
Why would Kisame state his own weakness lol? Why would ANYONE state their weak point in their jutsu. Lol no, just like literally everyone else, the character figures it out THEMSELVES. Thats always been shown this way from the manga. Do I really need to makes list of examples, despite you already giving one out, I really hope not.
A "possible" method that has been TESTED and was a SUCCESSES. You have no point FT, no matter what excuse your trying to bring here.
Kisames purpose was to drain out Bee.
Bee had to hold back because of Ponta.
They exploit the fact that they(Bee and Hachibi) needed to move to a opposes direction to see if Ponta would be safe.
Kisame had to TRICK Bee.
Bee forcefully moved Kisame, to move the Dome so Ponta can escape.
All these factor outright shows that this jutsu has a weak point, period.
Lol this dude, Dai Bakusui is NOT Shark Dance Technique, please get this out of your head. They're both different names and different jutsus. The ONLY thing that makes them go hand to hand is the very FACT that Shark Dance NEEDING its
water source to use it. Shark Dance jutsu takes up the WHOLE WATER SOURCE to be used, FACT! I can't believe your actually trying to argue two DIFFERENT jutsu actually are the SAME jutsu.
If you read the scan I croped in the full chapter with context: Yamato/Kakashi explains to Naruto that in order for Yamato to use Mokuton, being able to manipulate Doton and Suiton is necessary. And since Danzo can use Mokuton, yes he can handle Suiton and Doton.