I don't get why people make polls like these then add Arthur to them, someone made a "Which gang member do you like the least?" Then added Micah, what's the point if you add someone like Micah to that one, or Arthur to this one.
I think that's the point, the entire plan is stupid but Dutch doesn't wanna give up on it, Arthur says a few times that he doesn't think they should do it or that it won't go anywhere.
Sadie's Horse in the epilogue is just a freakishly big Mustang.