"Well, there's not really such a thing as feeling safe enough here, is there? It's the risks we can afford to take, and the ones we can't afford not to take."

And the question that needed answering was whether this plan fit into the latter of those categories. It had already failed the first check. They couldn't afford a war with Nohr, and it wasn't worth arming the king with the PR chip of having caused harm on the princess. How lucky that she was already on the side of simply wanting to resolve the problem rather than complicate it.