I was referring to “prosumer,” which, a couple years ago when I wrote the post, basically meant a Zoom H4n, boom, and possibly no lavs. To clarify further, I also was not at all referencing corporate shoots, but independent on the run-and-gun YouTube scale, per the original question’s context. In the context of steady production sound professionals, you are absolutely correct that the numbers are vastly inappropriate.
Even an H4n I’d hate to classify with an as lofty title as “prosumer”. That is more appropriate for Tascam DR680 / Roland R44 / etc and even the Zoom F8 which had came out back then.