Let’s just say the absolute worst happens and the Russians win. In order to be victorious, they will have to basically destroy the entire nation’s infrastructure and a huge percentage of its buildings. Even getting grain out, if land is still arable, will be impossible. So the victory will be pyrrhic at best. If Ukraine had just rolled over like they had expected, it would be different, but at this point, they’re fighting for land they can only win by making it unusable.