I guess the author must not agree, but I honestly consider video games more as interactive art than software.

There are several great open source games. And older games that went open source after the fact (id engine et al).

Spurning the industry seems a bit like saying: Hey movie industry - I've already got enough films, thanks, you don't need to make any more. Or telling writers that there are already enough books.

(FWIW, I hope to make a living from creating video games one day. I'd feel hypocritical not to buy games I want, and try to content myself with a selection of older FOSS games.)