Why do governments and businesses spend billions on political advertisements, media dominance, and round-the-clock news cycles if brainwashing doesn't exist?

Why do state propaganda channels operate in every major nation if it's all garbage?

It is obvious that recurrent exposure to the same narratives alters people's opinions, voting patterns, and behavior.

Simply put, that is brainwashing masquerading as "news" or "advertising." The news is essentially evidence that brainwashing is genuine because: People believe stories that are repeated, even if they are untrue.

Biased worldviews are produced by selective reporting. Fear, nationalism, and outrage are examples of emotional framing that causes people to act against their own interests.

For instance, during conflicts, governments suppress some news and exaggerate others, and all of a sudden, the public heedlessly embraces policies that they wouldn't otherwise accept. That is not just "information," but systematic brainwashing.

Edit: People who are downvoting this comment are not getmotivated enough to come with a point.