Eh.
Some cultural features are neutral, e.g., what you do about shoes when entering a home. Do you take them off and leave them at the door because shoes are dirty? Do you keep your shoes on because you have guests and you don't want them to have to look at your feet because feet are disgusting? If you do take off the shoes, does it matter how you line them up, and which direction the toes point? This all depends how you were raised; it's neither good nor bad, it's just culture.
But some cultural features are actively good for society. Japanese culture has features that lead to a low crime rate, for instance, and that's a good thing. Many cultures value things like integrity (particularly, keeping your word) and hospitality, and these are good positive values, that are good for society. I think it follows that there can also be cultural features that are bad for society. To avoid offending foreigners, I'll pick on my own society for an example here: in American culture, it's normal for people to deliberately lie to their children about important ontological issues, for entertainment purposes. That's *evil* but almost everyone here does it. (One of the best examples of this phenomenon, is Santa Claus.)
Bringing it back around to the Persian example from the article, my question would be, why is it that humans native to the culture only get this right 80% of the time. AI getting it wrong most of the time doesn't bother me, that's the AI companies' problem, and phooey on them anyway, so what. But if humans native to the culture are missing it 20% of the time, to me, that makes it sound like it must be some kind of esoteric, highly-situational interaction that regular people wouldn't have to deal with on anything resembling a regular basis; but no, we're talking about a basic social interaction that people have to do every day. Something seems off about that. That's a lot of pressure to put on people, to undertake something that difficult, and be expected to get it right all the time, and then catastrophically fail one time out of five. I don't think I'd want to live under that kind of social pressure.