And where did I say that they were never inside it? lmfao. Read boy read. If Obito tries to warp above then he gets crushed by Mokuton sprouting from below him since he needs to be solid to warp himself away. Then we have the fact that Hashirama can simply block his Katon.Lol the Gokage weren't in the flower tree world? If that's not being inside the flower tree world then Obito simply warps himself above the FTR and uses his Katon while he's in the air and burn the entire thing out from above.
Sasuke cut B's tentacles as well with Chidori. That feat means literally nothing. Try again, and none of what you showed means that Kamui has no build up time. The time in between the arrow being fired and it almost hitting Kakashi is when Kamui was used. Not to mention if he opens a wormhole and the arrows run right through it he doesn't need to build up enough power to warp the entire things mass in one go. Terrible example. Every Kamui feat against Obito during the war arc before his mask came off shows why people faster than Obito and Kakashi will have an easy time reacting to Kamui.The fact that they cut off Killer bee tails while in full BM means they rip right through Mokuton. Him not running out means he'll have enough to clean out the forest and if not he'll just burn it out simple. So kamui doesn't have the speed to snipe someone who can sense the build up? Lol so if Tsunade could sense she could evade Kamui as well i assume? Kamui build up is non-existent in actual time. Kakashi was in his 3tomoe state when Sasuke fired these arrows[You must be registered for see links]. Kakashi was about 20 feet away from Sasuke[You must be registered for see links]. He hand time to snipe 2 arrows. Kamui build up time is not there bruh sorry but Hashirama gets sniped.
-Obito reacted to it when Kakashi warped BM Naruto's clone.When was kamui sniped used on Kakashi ill wait? When was kamui sniped used on BM Naruto ill wait? Like i said before Obito reacted to kamui because Kakashi was warping a huge target(Before you try and deny this answer me this how come he didn't stop Naruto clone from getting sent to the kamui dimension instead he opted to try and destroy the clone before Kakashi could snipe it.) So i ask you unless you can prove Hashirama can stop himself from being sniped from the start your argument hold no weight.
-Kakashi reacted to it when Obito used it to warp Kaguya's bone to save his life.
Kamui's build up and warp time is shown multiple times during Kakashi, B, Naruto and Gai vs. Obito but I'm fully expecting you to make excuses like "they slowed it down on purpose". :lol
Hashirama blocks with Mokuton with no effort whatsoever.