Have you ever tried to manage the food situation of 6 duchies, when you can only see the food situation of 1 of them? Or none? The banker's bird's eye view is critical in keeping things organized. Sure, you *could* do it by trying to exchange messages back and forth. But that would be ridiculously cumbersome and error-prone. Especially if one of those dukes is just not interested in dealing with it.
I think if one of the dukes isn't interested in dealing with it, and a lot of lords are also not interested in dealing with it because they view the food game as simply cumbersome and a responsibility not worth dealing with then you're screwed anyway. So, No I haven't been Banker of CE on Atamara for instance, but I think the entire situation is just more easily solved if lords were given the "option" to let the banker directly manage their food stores if they don't want to deal with it. Then, the banker can work with those lords that actually want to manage their food, and personally handle the food of those that simply don't want to waste their time that they don't have.
and sure a vacation sounds just fine,
