The first part of your post wasn't bad, but if he could do that, he would have used it against the Uchiha brothers.
Thats not a good reason why he doesn't have it.
I can give you a whole list of what he didn't do in that fight. (If you literally want me to)
Just like how evidence showed Part 1 Gaara could always fly, but decides later on in part 1 that it was needed in a scenario. Same can apply here.
What I find absurd is the fact that you're bringing in 5-prong seal into the argument. That only works if the user can touch the jinchuriki's seal. This is something Kabuto will never manage to do.
Every strong character will end up meeting and encounter each of the character's jutsu. Thats why I said someone make a verses thread and I will show you plenty of ways of how Kabuto can touch Naruto
EJBlack giving feats to Kabuto that he doesn't have.....as usual.
I wouldn't give feats that doesn't support it with proof. If the evidence doesn't apply then I won't state it as a feat. And here is evidence:
1. Kabuto has research Hashirama's cell thoroughly, and being the first to create poison to nullify its power[
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2. Kabuto fixed up Madara's body, which only Kabuto was able to do. And he is the reason Madara can do Mokuton like Hashirama, fact[
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][
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].
3. Madara's Hashi cell was only a portion of strength[
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], and not enough to use Mokuton like Hashirama[
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4. Kabuto wanted take Yamato to finish his experiment, and yet ask Obito for at least one Zetsu, the inferior version[
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]. It didn't matter what inferior version Kabuto had, as he can make the cells at its peak like he did for Madara. (Kabuto hides his experimental intention [
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5. Obito sneaked in Zetsu's inside of Kabuto[
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]. Kabuto was fully aware about Zetsu's ability, and knew they were on Sasuke too[
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6. Kabuto stated all he needed was one to complete his experiment, Zetsu spores shows more then one of uses. Kabuto is giving the cells to Sasuke to patch him up this current chapter[
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7. Kabuto has the ability to manipulate his cells. Putting two and two together, enables him put use to what he actually knows.