Wait, this is great. It means the guilt trip is very good at entrenching a viewpoint. So if you want to fuck someone over, find something he's doing that's hurting him and guilt trip him till he doubles down.

You can do this at the whole society level: for instance, no society that underemploys some large fraction of its populace will effectively compete against an equivalent one with efficient workplace participation.

So you can then blame them for all sorts of things. Guilt trip the Arabian nations for low participation of women, the Mississippis of America for low black participation. They'll double down and not correct. Then you beat them by just being better at using your people.

Sadly the article only hypothesizes this and doesn't talk about concrete evidence for the entrenching effect but one can hope.