That seems like a dangerous generalization that someone can use to hand-wave away any actual misinformation, which as the blog mentions, does exist and is spread (albeit by a small percentage of very prolific posters).

Misinformation exists, and it is a problem. At this point we've seen some evidence that state actors put some of it out there during the 2016/2020 elections, and it can be spread organically.

That said, it's not nearly as widespread or problematic as it's made to be by much of popular media.