Luffy's crew is not like WB each member has a function that they excel at, please conjure up some way a Samurai could be an role that she excels in besides her being broken strong, which makes Zoro redudant.
Did Rayleigh become redundant when Oden joined the Roger Pirates?
There’s nothing wrong with the idea of Yamato excelling in her role by being strong. Zoro and Usopp both have pure combat roles already. And tbh, so does Luffy, going back to his speech against Arlong.
”I can’t do X, Y Z!”
”Then why are you the captain? What can you do?”
”I can beat you.”
Does that make Zoro redundant?
You're the one that seems to be tripping on this point, you're headcanoning that somehow in some way Momo is going to discover the true history and then open the borders as oposed to what he actually said of not opening the borders because he can't protect Wano.
So let’s make this clear.
Are you saying that Momo will never open the borders, which would be bonkers?
Or are you saying that he will but only when he reaches some arbitary level of strength?
Cause I personally think “I don‘t know why my dad wanted to open the borders because he ripped that page out of his journal” is a pretty clear sign that when Momo does find out that information that’s when he‘ll do it.
You already conceited Yamato staying in Wano is just as valid as going with Luffy, but it's actually the only thing that matters is protecting Momo.
Traveling with Luffy acomplishes dogsht if she did, someone could just invade Wano
There’s a multitude of samurai to protect Momo and he wants to get strong enough to do it himself.
What I’m saying is that Oda has left the door open for Yamato to join the crew in the future once she thinks Wano is secure.
And that doing so would still help open the borders.
If Oda actually will do it, I don‘t know, and with the way Wano ended, I don’t really care. But the option is very much alive because even after Yamato decided to stay behind, she still says she wants to be a Strawhat and has an invite to join in the future (which she is delighted at).
And to cycle all the way back to the beginning, this shits on Carrot.