Would assume it's to check if a site is foreign propaganda. A lot of the lesser-known news sites that you see linked on social media are actually psy-ops pushing an agenda, many of them foreign-based. Follow the technique in the article and you can easily blacklist Iranian ones.
Why are people in the (presumed) West particularly afraid of the propaganda of a Middle Eastern country? Is the intelligence/propaganda unit there so good that they can program minds from a different continent better than Western oligarchs? This has got “Russia stole American democracy with millions worth of FB ads” vibes to it.
But if there is an easy technical implement to avoid some propaganda then good on them I guess. Why not. One less thing to worry about.