Oil (diesel), gas and fertilizer is the backbone of the worlds agriculture. With shortages of all 3 the food production goes down dramatically. Even if the war ends today it will take years to bring back production to previous levels. In my opinion the effects will start showing up in food prices in the next few weeks once food producing countries realize the food shortages could happen they will start restricting exports.
Because it's whataboutism which is basically propaganda. It doesn't add anything to the discussion, and if we put too much emphasis on other unrelated (but still important) issues, the site wouldn't exist at all.
Example: Why are you posting here when you could be solving world hunger? Don't you care about starving children?
Or the angle that most likely never gets discussed such as the potential effects of heavy reliance and overuse of fertilizer being a contributor to pollution than crop yields; I don't have all the sources but here's one I was reading over the weekend:
We are trully doomed.