This article tries to redefine the word nerd to fit a specific type of person that they need a word for in order to talk about without describing them every time they want to talk about them. To do this, they redefine the word nerd. Its a misunderstanding entirely I think.

The differences between nerd and geek were determined long ago by analyzing how they were used on twitter (source: https://slackprop.wordpress.com/2013/06/03/on-geek-versus-nerd/)

The author here says nerd, then describes a nerd and says this person is not a nerd, then describes a geek and says these people are the nerds.

And only a nerd could give a verbose rebuttal like this lmao.