I have absolutely used whiteboards on the job at every software job I've had. Collaboratively brainstorming a system design, working through examples, and conceptual context shares all work much better in a whiteboard environment than pretty much any other environment that I know. I get that it's good to cater to introverts, but I don't think that means it's unreasonable to expect someone to present ideas and collaborate while on the job.
It's fine to criticize whiteboard coding as unrealistic, but the author is saying that whiteboard-based interviews as a whole are "social ignorance and intellectual dick-waving". (Technically they just used the term "whiteboarding" without defining it, but I think if they meant "whiteboard coding", the article needs to be more specific about that.)
Does this person ask good questions? Do they respond to my hints well? Do they give up easily?
But using the whiteboard as an interview technique is a terrible idea. It's not representative of the work that the candidate would be doing, and it doesn't give the interviewer much in terms of useful information about the abilities of the candidate.