Yes, travel insurance is genuinely worth carrying for a trip to Bariloche, and the honest reason sits squarely in what draws people here: steep mountain terrain, a real ski season, and a level of remoteness from major specialist care that a routine city policy will not anticipate. This is Argentine Patagonia, not a resort town with everything on hand, and the case for cover follows directly from that. Even travelers sticking to the town itself, with no plan to ski or trek, still benefit from ordinary medical and trip-delay cover, given how easily flight schedules into this part of Patagonia can shift.
Winter here, roughly June through September, centers on Cerro Catedral, the largest ski resort in South America, and draws skiers and snowboarders from across the continent; summer flips the draw toward trekking and hiking through Nahuel Huapi National Park's lake and forest terrain. Both carry real injury risk - falls on-piste, exposure on remote trails - and many standard policies cap or exclude winter sports and backcountry trekking outright, so confirm yours names both explicitly before you book a lift pass or a multi-day trail.
Bariloche has its own regional hospital capable of handling routine and moderate injuries reasonably well, but anything genuinely serious - a bad fracture, altitude complications, a major trauma - typically means transfer to Buenos Aires, the country's real specialist-care hub, a couple of hours away by air. Confirm your policy covers medical evacuation and transfer between Argentine cities rather than assuming local care is the end of the story.
Keep any clinic paperwork, resort or park-ranger incident reports, and receipts for treatment or gear loss, since claims tied to a ski injury or a trail accident need more documentation than a routine illness. Check whether your existing health cover extends abroad and specifically to Argentina before you rely on it, and confirm the policy wording names winter sports and trekking directly rather than leaving them open to interpretation after the fact.