He literally says: "Our definition for vanity activity can be similar: something you do that seems more useful or virtuous than it really is."
And then he suggests that reading the news is a vanity activity.
My comment is perfectly on point. I think he is engaging in a vanity activity, by his own definition, when he suggests that reading the news is a vanity activity.
It's fine to have an opinion and a way of looking at the world. My objection is when a person claims that opinion is something more rational than it is-- while pissing on the choices other people make.
It is not hard to convincingly argue that reading the news is less useful than many participants believe it to be.
You in particular getting as much value out of the activity as you think you do doesn't negate the point of the article. Exceptions make rules, and the author said "most people".