Well, you're not driving off the "black bits". There's still plenty of "black bits" (unburned carbon and high-carbon compounds) in the interior. It's just that 1. you really really want to wait until the lighter fluid is burned off and 2. the whole surface hasn't started burning until the whole surface has started generating white ash. In the case of charcoal with igniter integrated in the outer layer ("match light" charcoal), I would guess you want to burn off that outer igniter layer.
As a young boy scout of 12 or so, I ate some pork that my patrol and I had cooked over charcoal before all of the lighter fluid had burned off. It tasted like lighter fluid smells. We never made that mistake again.
Pro tip from 12 year-old me: styrofoam cooler lids make great fans to speed the progression of the reaction.
Pro tip 2 from 12 year-old me: don't get the lid too close to the charcoal, or it will melt. Also, wet wool finger mittens can cook and become brittle far from a wet wood fire, because the fire gets very hot when you blow on it to keep it from going out and very cool when you go to check the temperature near your mittens.
