The biggest misconception is that organic farming does not use fertilizer, herbicides, or pesticides. Of course it does. Fertilizer is essentially chemical nutrient, and the organic version delivers exactly the same chemical load as the synthetic. It has to, otherwise it wouldn't function. All plant fertilizers, organic and synthetic, consist of the same three elements: nitrogen, phosphorus, and potassium. Referring to one as a "chemical" and implying that the other is not, is the worst kind of duplicity, and no intelligent person should tolerate it.
Scientifically, the term "organic food" is meaningless. It's like saying a "human person". All food is organic. All plants and animals are organic. Traditionally, an organic compound is one produced by life processes; chemically, it's any carbon-containing molecule with a carbon-hydrogen bond. Plastic and coal are organic, a diamond is not. So when we refer to organic food in such a way to exclude similar foods that are just as organic chemically, we're outside of any meaningful scientific use of the word, and are using it as a marketing label.