This has been done for decades. It is PR 101, and it is done to indoctrinate and subsequently normalize XYZ onto the average consumer/citizen.

In Marketing, you get taught that the average person has a memory of 3 to 6 months for issues like this, at the most. So, if you can afford to stretch something for longer, than acceptance on average, will always go up. Attention span are short. In other cases, it alleviates any cases of legal liability. Since no one can say they were not warned.