At the risk of diverging into politics, it's amazing how "influencers" can do this with social media posts without spending lots of money. As long as the information is from someone (company/individual/etc) perceived as reputable, people will believe almost anything at face value. It's much easier than researching something on their own.

Whatever the message, say it loud and often, and it becomes accepted as true. Call it spin, call it PR, call it marketing, it works.