Plenty of people will use those pans and

Overheat them, which means the stuff gets into the air. Many many pet birds have died of this only because they're more susceptible

Use the wrong material in them meaning the start to scratch the Teflon layer.

I'm not saying you cannot use them right, but too many people don't and the product isn't safe when improperly used. This is true for many products but in this case plenty of people aren't aware they're holding it wrong.