That's a fair point, though I'd still wager that for those of us not cooking over open fires, those effects are likely very minimal - at least in contrast to the people mentioned earlier.

Everything's relative, sure, but pay close attention to your sense of well being the next time you're in a car with an air freshener, or someone sprays febreeze in a room. You'll probably start to feel uneasy and/or have dulled senses very quickly. Do that often enough, and the abuse adds up.