Earlier quoted context omitted.
>I probably still have a moleskine with notes on the matter. Why do people insist on telling us the brand of their notebook? It's just a book with some blank paper dude...
It's called "descriptive detail", and can add atmosphere to your writing. Why do people insist on telling us their pet peeves? It's just your pet peeve dude...
But by questioning why he voiced his argument, you validated his argument and thus the reasoning behind it. Your question, posed as such, answers itself, in a way.
What beauty.