This isn't true. Originally advertising was designed around the premise of explicitly highlighting utility and functionality of goods/content. It wasn't until Bernays came along and adapted his uncle Sigmund Freud's theories into practice by designing advertising to manipulate people into believing that they actually need the product.

Modern advertising is not just "showing a product to induce demand". Car adverts don't just highlight functionality, they use mass market analytics to play emotionally driven messaging and visuals so that you associate that feeling with the car ad.

Do you know what Bernays called what services he offered before the word got tarnished?

Propaganda.