I think it depends on where you keep your bird. For instance, I cook with all the pots and pans we are told not to cook with. My bird is in the basement and is no where close when I cook. I also burn candles and incense, but away from the bird and never when I have him out with me. Some people ask me "Why risk it?", but I don't see it as a risk because I never had an issue, and I am smart enough to know that cooking near your bird is dumb, and having your bird in an area of the home that can be potentially dangerous is dumb.
I think it's just common sense, if you think something might harm your bird than keep your bird away. I personally wouldn't have my bird anywhere NEAR the kitchen as there is too many things in it that can hurt the bird. So why be near it at all?