If I’m enjoying something as art, that puts me into a different category, but when purchasing a game for fun, or music as background noise, or a decorative painting I am in a totally different mindset than when I am engaging with those same things with a mind towards their artistic qualities.
The intentionality of the viewer matters, and the author, IMO, fails to recognize that a lot of people, myself included, often come to games with the intentionality of playing a game, not necessarily judging its artistic qualities. We sometimes do, but I think it would be bad faith to argue that we all are always appreciating every “artistic quality” of a work all the time - I know I’ve enjoyed a bad game, movie, show, or song more than once.