Because they know that if they lie to you and market the right way they can fool you into buying it. Just look at cigarettes.

Or better yet look at plastic. We need to stop producing plastic. As a consumer unless I literally grow my own food I don’t have any choice but to buy plastic. Literally everything is sold and packaged in plastic. The producers took the system hostage and I don’t have much of a choice as a consumer other then die.

Producers create the demand for their product. It's called marketing.