Step one with someone locked or frozen-stuck in such belief-logic is that improvement is possible - which is part of developing psychological flexibility.
You'd have to pay attention and find any step forward possible for them to begin to enter the discomfort that is holding them back - which may be the biggest challenge of their lives up until that point.
Ideally though, as we're all sheep to some degree - which is exactly what this HN post is stating in a more sophisticated way, and attempting to warn for this - ideally there's a culture of practices that develop oneself, so you're just going along with the "herd" - that path hopefully not corrupted and led by bad actors attempting to send us off a cliff or into their totalitarian pen.
You'd have to pay attention and find any step forward possible for them to begin to enter the discomfort that is holding them back - which may be the biggest challenge of their lives up until that point.
Ideally though, as we're all sheep to some degree - which is exactly what this HN post is stating in a more sophisticated way, and attempting to warn for this - ideally there's a culture of practices that develop oneself, so you're just going along with the "herd" - that path hopefully not corrupted and led by bad actors attempting to send us off a cliff or into their totalitarian pen.