yeah, its an option, but you have to pay for it. check any car company's website and "build and price" a car. its an extra $30 or so for an ashtray and lighter.
What's your point? It's an option to smoke, too. If I want leather seats I have to pay extra, based upon that choice. If you want to have an ashtray, you get one. I don't think it's acceptable or intended that because you choose not to get an ashtray that it's ok to throw the butts outside.