Back in 1970, smoking advertisements were banned on TV, so the companies put product placement in all the movies. Everyone smoked, or drank beer or sodas with the name on the can or pack clearly visible.
Has something changed now to not show smoking in movies?
I don’t think it’s been totally banned, but it is highly critcized, the point being that there seems to be no argument that seeing people smoke in movies encourages the behavior, while the same effect of violence is denied.