No, he's not doing the same thing.
He's pointing out that some people with a very narrow range of knowledge about a subject suddenly decide that they are in fact now qualified experts who don't have to take anyone else's opinions seriously.
Often, they don't know enough to evaluate the quality of the information they do have, which only makes things worse.
And he's right. It's irritating the way he put it, but definitely true. I've seen it happen here and elsewhere.