Your first paragraph and your second paragraph contradict each other.
It's funny how you contradict yourself. Basically... don't tell me that I shouldn't give sasuke feats he may not have based on manga assumptions and then tell me that the basis for saying madara may have a feat he currently does not have is based on assumptions that he may have it because of another assumption.
They don't contradict at all...
1) Sasuke can't use Izanami. Nothing suggests so. All he has is knowledge on the technique. Having knowledge on the technique ≠ having the ability to use it. When the manga explicitly states that he can use it or explicitly shows him using it then there is no denying it then. But for now? We say he doesn't have it.
2) Madara's case is different from Sasuke. Madara can avoid techniques like KA and Kamui because he has the ability to do so. KA is not an unstoppable technique as some people say because it has failed because. Any ninja who can detect foreign chakra can counter it. Kamui can be avoided through precise reaction time and precise timing regarding when obito becomes vulnerable and tangible. I'm just using these as an example....
As far as Izanami goes? Madara is shown to have advanced intellect and we know that he has a lot of knowledge on loads of techniques. Since he is an uchiha and Izanami is an uchiha dojutsu, there is no reason for him to not know the In's and Out's of that technique. The same way that he knew all about Edo tensei, he knew how to counter the technique. The same could be said about Izanami. Nothing suggests either that he can't avoid izanami.
On top of that, we don't really know how efficient Sasuke would be with Izanami if he were to use it.
To those saying "Izanami was made to counter those who don't want to accept their fate"... well madara clearly doesn't want to accept his fate - which is to die.
His whole life after near death was to come back to life 100 %.
I'll make another point here about Izanami. I find that the quoted here is subjective.
Obviously he does not want to die just like most people. That doesn't mean that Izanami can use that fact to stop him and that doesn't mean that he is having the same issues as kabuto. Madara's goal was to come back to life so he can execute his Eye of the Moon Plan.
He watched his own brother use it. Sying he doesnt know is stupid. By your logic if you dont know how to do a jutsu you cant use it. ~_~
Ot/op i agree. Hes not that stupid but still
What? How does watching his brother automatically give Sasuke the ability to use the technique? ROFL.
