Why don't people believe in Scientific Studies?

[Igel]

15. And then there's the last stage or two when talking to adults in a democracy.

If they choose not to follow the advice--because that's what it must be in a democracy or when dealing with adults you don't control--you may decide to keep talking but don't be offended when they don't pay attention.

(Being honest about the drawbacks is also a good thing, but not confusing the science-based "the science indicates this will happen and the way to avoid it is X" with the coercive political "the science indicates this will happen and as a result we must all do X" is a good start.)