Granted that emergent behaviors are important. The reason for injecting "just" is to counter the AI hype. Imagine if the headline read "With a nudge from linear algebra, ketamine emerges as a potential rare disease treatment". Dropping the word AI in there, in addition to boosting the articles SEO, will suggest to those with a casual interest that his must be a big deal, because "I've heard so much about how AI is solving <insert big problem here>"