Nothing changes...just flatter people that
They are "Independent minded" and you can get them to poison themselves wholesale and pay for it at the same time:

Bernays...developed an approach he dubbed “the engineering of consent.” He provided leaders the means to “control and regiment the masses according to our will without their knowing about it.” To do so, it was necessary to appeal not to the rational part of the mind, but the unconscious.

"Torches of Freedom" was a phrase used to encourage women's smoking by exploiting women's aspirations for a better life during the early twentieth century first-wave feminism in the United States. Cigarettes were described as symbols of emancipation and equality with men.... "

...Bernays’ publicity campaigns were the stuff of legend. To overcome “sales resistance” to cigarette smoking among women, Bernays staged a demonstration at the 1929 Easter parade, having fashionable young women flaunt their “torches of freedom.”

He promoted Lucky Strikes by convincing women that the forest green hue of the cigarette pack was among the most fashionable of colors. The success of this effort was manifested in innumerable window displays and fashion shows.

In the 1930s, he promoted cigarettes as both soothing to the throat and slimming to the waistline. But at home, Bernays was attempting to persuade his wife to kick the habit. When would find a pack of her Parliaments in their home, he would snap every one of them in half and throw them in the toilet. While promoting cigarettes as soothing and slimming, Bernays, it seems, was aware of some of the early studies linking smoking to cancer.