In the anime, Banye paid a big price in order to get the inter-column cells.
Marcel the Giant of the Jaws
In order to open the reincarnation eye, it is an indispensable choice to implant yourself with inter-column cells first, so Banye must run this trip.
But this prerequisite does not apply at any time, but only after his defection.
If he had already obtained the inter-pillar cells before he left the wooden leaf, then there was no need to do it again, just try it slowly. But that way, no one else has a chance to know the progress until he makes a result.
If Ban Ye first obtained the inter-pillar cells and then left, would the Six Immortals have time to stop it?

1, to see if he is always staring at the world
At the crucial moment of the 4th Ninja War, Naruto's tail beast was sucked away, and Sasuke was stabbed by Banya, both of which were in a state of suspended animation.
At this time, the Six Immortals appeared in their consciousness space and had a good chat with the two "sons reincarnated".
If the Six Immortals hadn't gone through this fate, BanYe's action would have gone smoothly in the future, because few people had the ability to stop him—if they could stop him, it was estimated that the black extinction that was ready to strike in the shadows would be left.
If the Six Immortals just didn't notice, it was estimated that the entire ninja world would have to finish playing.
From the four battles of the main drama, we can see that the two Uchihas of Banye and Belt Earth have brought great pressure to the ninja side after the six realms.
In the early stage, the six belts of earth could be jointly suppressed by several shadow-level masters, and his sanity influenced by the six daos played a great role.
And without so many shadow-level masters working together, how amazing can a sane six-level Uchiha play?
Ban Ye was not as lacking in combat consciousness as Hui Ye Ji, if he wanted to fight quickly, the Six Immortals might not notice anything wrong until the end of the battle. Even if he could detect it, he might not have time to fully bless the pillar to defeat Banye, who had already gained the advantage.
2, to see the energy he has divided into banye
Why can Ban Ye enter the Six Paths Mode?
Step 1: Interstitial cells are obtained and implanted into the body to open the reincarnation eye in a random time period.
Step 2: Summon the Outer Path Golem through the Eye of Reincarnation.
Step 3: Collect the Nine Tailed Beasts or some of their chakras and seal them into the Outer Path Golem, and when the gathered chakras reach a certain threshold, they can enter the six modes.
If Ban Ye obtains the inter-column cells before leaving the wooden leaf, no matter what excuse he uses to leave the wooden leaf next, or simply find an excuse to temporarily disappear from everyone, he can buy himself a lot of time to run into the inter-column cells.
In this process, as long as he could hide from the pillar and the other Thousand Hands Clan, Banye could safely proceed to the next step.
In the original work, after BanYe opened the reincarnation eye, why didn't the six immortals notify the pillar in time?
From the scene of encountering Nagato, he began to push backwards:
All three of them looked very young at the time, and there was a significant difference in appearance from when he wrote a novel featuring "Naruto". Naruto was born shortly after World War III, so it should be during World War II.
At this time, it was already cold between the columns.
Even if the Six Immortals found out that Banye was secretly doing something, he couldn't immediately notify asura of reincarnation. Taking a step back, even if it could be notified, this reincarnation would not be in the world, and it would be said in vain.
But if Ban Ye had implanted the inter-column cells into his body without dying once, causing the reincarnation eye to open earlier, the Six Immortals might have found something wrong.
If the pillars are not bright at this time, it is more likely that Banye's Eye of the Moon will be exposed.
If Banye had not returned through Izanagi, he was in his prime and energetic, and with the sneak attack means that could be used at any time, no one except the pillar could withstand his attack.
Whether or not the Nine Tailed Beasts were locked up in a large ninja village, they probably couldn't escape his clutches—even if they weren't caught, they would be bald.
If the pillars were unfortunately hung, then no one in the entire ninja world would be able to stop the Banye with the eye of reincarnation—unless the Six Immortals were willing to bless the people of the Thousand Hands Clan with their own Six Dao Powers, regardless of the cost.
No matter how you look at it, BanYe didn't hand over some inter-column cells before leaving the wooden leaf, and he felt a little lost in the opportunity.
Originally, The Group of Kiba didn't know what he wanted to do, and it was unlikely that he would wantonly slander him in front of everyone in the Ninja Realm before he led the Nine Tails to kill him, which was a good time for him to recuperate and keep doing things.
But if he seized this opportunity, then the ninja world would really be finished.
If the plot goes in this direction, how do you think it will come back?