Exactly, it is a weird title. Modern art is as much of a "psy-op" as:

  - grocery stores
  - NASA
  - rock music
  - psychedelics and hippies
  - a strong middle class
  - affordable vehicles and the highway system
  - Hollywood movies
  - Books

and just about anything. Cultural "warfare" is a different ballgame. K-Pop and K-dramas are "cultural warfare" from Korea. J-pop and anime from Japan (here's a clickbait title: Was Studio Ghibli a Japanese Psy-Op?). So is Thai Food and avocados. Anything that makes the country look good or even become more well known outside its borders can be considered a "psy-op". But not in the sense that any reasonable person would interpret the term...

That said, the article is still interesting and I wouldn't ignore it just because the dumb title.