Hospitals in the UK go near or exceed their capacity in any flu season, it happened many times before 2020 and is due primarily to badly managed nationalized health and social care where supply/demand aren't joined up. This doesn't mean anything was wrong with Elon's position.
i’m not so sure this is because of socialized medicine considering how often american hospitals run into capacity issues and the general state of wreckage that is US health care—which by the way is a significant amount the most expensive per citizen in the world.
Primarily due to badly managed privately held, for-profit care where supply and demand aren't joined up. (because it's a hospital and avoiding death is inelastic).