I don't know about smoking being cool (I'm very biased against smoking, because my entire family smoked and I have asthma), but I do know that people smoked hundreds of years before advertisements were a thing. I've also always thought that jewelry was silly and pointlessly expensive, but I do know that people were affected by advertisement.
You should read up on the relationship between smoking and advertising. It's actually really interesting, and there's no question that advertising alone is the reason that smoking became so prevalent in society.
A similar story applies to other things that we consider so normal today that we don't even think about them, like deodorants, women shaving their legs and armpits, etc.
All of these things only became common because of advertising.
