There are certain pesticides that are approved for organic farmers. I don't know the details of the chemistry or whether those pesticides are actually organic, but there's a whole list of pesticides that aren't allowed if you want the organic label. I can only assume the ones mentioned here are or will be among them.
Sure, Monsanto has shady business practices and uses biased internal studies to get "organic" versions of things that are still harmful, but that's a Monsanto issue and an issue with the politicians who have Monsanto in their pockets. Same deal with roundup being labeled "safe" for household use even though independent studies say otherwise.
But if you want to make this about semantics, then "organic" means "containing carbon which is the building block of life" when you're talking about chemistry. When you're talking about geometry, organic means something different. When you're talking about processes, organic means something different. I don't think it's that unreasonable to say organic also means something different when talking about food labels, especially when the definition in that context is clearly defined by legislation/regulatory policy.