UN appeals to Putin's better nature!

If ever there was an oxymoron designed for the Russian leader it came in an appeal from the United Nations to Vladimir Putin. The peace and love organisation appealed to Putin's better nature to allow grain from Ukraine to be exported to the world to avoid starvation in many of the poorer countries. Judging by what Putin has done since he took power two decades ago, including annexing Crimea, invading Ukraine, occupying two provinces in Georgia, killing many of his opponents, sending spooks with Novichok nerve agent to assassinate his enemies etc etc etc, I don't think the man has anything remotely looking like a better nature. So the UN appeal to do the right thing and allow Ukraine to feed the world with its grain harvest will I assume be greeted with disdain. Putin will see the export of Ukrainian grain as a bargaining point to get what he wants from Kyiv. Like surrender. Would he dare do that, blackmail Kyiv and the West into surrendering in return for feeding the poor around the world? You bet he will. He has already blamed Ukraine and its western supporters for the grain crisis, claiming it's the sanctions which have caused the calamity, not the war. Putin has never shown sympathy nor compassion for anything. These two personality ingredients are not in his make-up. So I fear the grain shortage will be just another disaster facing the world and Putin couldn't care less.