Nihilism means there is no meaning. Whether that pertains to existence (existential nihilism) or morals (moral nihilism). Nihilism effectively works both ways: “Nothing matters, so I might as well kill myself”, and “nothing matters, so might as well make the most out of it” (constructive nihilism).

This I believe falls under moral nihilism, where there is no right or wrong, only what feels good or bad. Which the article hints at by mentioning that the actors seem to have no ideological goals.
So it’s not a completely irrelevant use of the term, imho.