Experience. We've also basically seen in it in the pandemia all over the world happening in the last years. Though, this was a bit of an extreme situation for everyone.

> In my experience exposure to more viewpoints, even flawed ones, increases understanding and helps critical thinking.

Simple exposure is only helpful if the people are able to handle it, and willing to invest the time, and the one delivering it has no bad intention. The ones where it will not work, are left as the victims of this strategy. Maybe they will find their way after a long painful process. But then the harm is done.