Not much has changed in four years in our field. I think part of the sentiment that my colleague with the answer was sharing may be due to the fact that the business actors in our field (CTOs, Human Resources, CEOs) have expropriated pair programming as a way to "test" someone's skill level during a job interview, as if looking for work and interviewing wasn't stressful, now you have a colleague whom you've never met, making a judgment call about your skill level and the assumption in the in-human resources paradigm is that if the person has the job and you are the shmo looking for the job, then they know more than you, which may or may not be the case, either way it flies in the face of what the whole purpose and original intent of pair programming is for.
I’m a huge advocate of pair programming as a way of bringing a kind of mutual accountability to the learning experience of new software developers, the way the business world has been using pair programming in interviews flies in the face of mutual accountability and the original intent of pair programming which was for colleagues to help each other out. The original intent of the pair programming idea is to learn collaboratively by doing remote pair programming, which speaks to what you are talking about in your OP, but many of us have been on the receiving end of what I just described the business world has used pair programming for, just another tool to toss more resumes into the file cabinet marked as rubbish and so when you get backlash answers like the one my colleague gave four years ago, do not be surprised by them.
Certain schools of thought would say what is wrong with using pair programming as part of an interview process. Right, so the idea as I understand is that it should be no different than a couple of pilots on an airliner jumping into a simulator and working together, well, any pilots in the room? You are now in a cabin with a complete stranger, so that makes you nervous enough, right? It does for me. You are not working "together" in this simulation but rather you are being judged for passing this simulator test by the other guy who is in the cabin with you, so that sets a different kind of tone then what I argue was the original intent of pair programming. So there is your problem, you are not seeing that candidate at their best and as one keen company recently posted in one of their job ads, we want to see you at your best.