Attribution Error gets doubly dangerous when combined with another cognitive bias, the Out-group Homogeneity Effect[0], which leads to the Group Attribution Error.[1]
This latter error leads people into thinking the characteristics of an individual group member are reflective of the group as a whole, so "When someone in my tribe does something bad, they're not really in my tribe (No True Scotsman / it's a false flag)" whereas "When someone in the other tribe does something bad, that proves that everyone in that tribe deserves to be punished".
I think the author is not exaggerating by suggesting that solving Attribution Error could dramatically change the outcome of human civilisation, but just identifying it as a problem isn't even half the battle. Perhaps the best we can do for now is develop some sort of polite shorthand for saying "You might be Attribution Erroring", which can be used for calling out bad news reporting, bad social media posts, and unhelpful framing of issues when people are having conversations. Then we need to train our brains to always be looking out for this problem, like a bad "code smell" when doing a code review.