When faced with facts and proof we expect a rational person to make an intelligent decision on what is better. But that does not always happen. People make decisions based on hope, fear, what others appear to be doing, and what they believe has worked in the past. Viral stories and shocking testimonies can trump detailed data. We see this with the anti-vax movement. Ultimately they believe that vaccines do not really work and have hurt more people than helped. There is no point having endless fact-based discussions. No amount of data will change their mind because "it's all fake and it all comes from big pharma". What's needed is a series of stories and testimonials from those in the group who have changed their minds. These mind changing stories need to be shouted. The ripple effect will begin. Over time more will change their minds. It may take a while but it will happen. The proof of it is that these days it's very hard to find people that still believe the earth is flat.