No matter how you explain it its a plot hole madara cant use susanoo and obito cant use kamui... heck the fact madara could even use kamui is a plothole considering he swapped eyes shouldnt it have just turned into an ems?
That underlined statement just means you wont listen regardless of how logical the statement is, and regardless of if it uses proper reasoning.
Its really quite simple.
Obito while the juubis jin, cannot go intangible. He could only use full kamui to go to kamuiverse. This is pretty much proven by 2 things.
1. Obito uses kamui to go to kamui land, while he has yin kurama inside him.
2. When obito made the statement, he would not have had enough time to do a full kamui to avoid a attack.
Madara may be able to use susanoo, but he uses the black balls instead, as they are superior defensively and offensively.(pretty much)
Also just because you implant a ms, does NOT mean that it will become a ems.
Only certain PAIRS of people are able to get a ems. Itachi and sasuke. Madara and izuna. etc.
If itachi implanted shuishus left eye, then he would just have shusuis MS. He would not gain a ems.
EVEN IF madara implanting obitos left eye, would become a ems, he would still be able to use kamui.
The reason madara was able to summon the gedo out of obito, and not summon kurama, was because obitos seal was weak, because he was severely weakened.
But to the OP. You did not need to post so many posts, or come up with a complexish theory. That viz page alone comfirms that obito just cant go INTANGIBLE. That he never said he couldnt warp.(good theory though. I disagree about your explanation of the jin part,(i think you are overthinking it), but I think you have a good grasp on the situation itself.)
