I've never heard anyone complain about the statistics being too precise. Yea, it can give a forewarning to your neighbors if you want to pop up a large army in secret... but then again, everyone benefits from it. And hell, if raising large armies in secret was possible, I suspect there's be a lot more of these not-declaring-war-until-in-the-capital move, as people wouldn't be able to take preventive measures. And these aren't any fun at all.