The article strips out that narrow context and generalises. Phrases like “music eases surgery and speeds recovery” and “strongest evidence yet” extrapolate from a sample of 56 people undergoing one procedure to “surgery” in general. The paper doesn’t measure global recovery outcomes, discharge times, or longer-term effects. Satisfaction and pain scores are even reported as comparable between groups (P=0.361 and P=0.07).
There’s also mechanistic speculation in the article (implicit memory, psychological responses, “humanising the operating room”) that isn’t in the study’s data. The paper reports dose differences and perioperative physiological measures—not neuropsychological mechanisms.