I did originally mention that it was no longer possible to do it, therefore that food wasn't as much as a motivator as it could once be.
Why would anyone only consider stealing food to be effective? For D'Hara's circumstances? Sure, makes sense. For anyone not running a deficit? Burn every field you come across. While it's true that stealing grain both benefits you
and harms your foe, too many people think about things in that order only. Sometimes, it's better to hurt your foe first and last.