The problem I see with these labels is they lack specificity. A sticker on the visor in a new car says this vehicle contains chemicals that cause cancer and /or

The problem I see with these labels is they lack specificity. A sticker on the visor in a new car says this vehicle contains chemicals that cause cancer and /or birth defects. I know the paint does, as do all the fluids. What about the steering wheel and the arm rests? My pen doesn't have a warning, is that because the manufacturer chooses to consider exposure through skin contact only, but chewing on it is actually a sizeable risk?