I can not make the smoking argument on its own because there are too many other things which, IMO, are WORSE for everyone.
I don't understand that argument. We shouldn't ban smoking indoors because there are things that are worse. Well, by that argument we shouldn't have stricter laws about car emissions, because factories are worse. And we shouldn't make drunk driving illegal, because flying a plane drunk is worse. It doesn't compute. Just because there are things that are worse it doesn't mean that this isn't bad, and shouldn't be regulated.