>It means they take their problems and assume that they are problems that others have.

Well, it's the internet and no one's singular experienc truly unique. So yes, that is a safe assumption. I doubt the author is the only person in the world with a friendship broken over some relatively benign story.

>GP is suggesting that the authors is assuming society has certain attributes, when in reality its likely just attributes of theirself.

Could be both. Or neither. It's a blog, not a study, so I don't see much point dissenting an anecdote. The point is to share ideas to the world. And given the nature of the internet, some will resonate.