There haven't been any common beliefs or narratives that young people couldn't die from driving or couldn't die without visible causes. On the contrary, the common narrative about driving is that young people are disproporionately dying due to inexperience and reckless behavior, and this narrative is true, more young people die in car crashes than old people. https://www.iihs.org/topics/fatality-statistics/detail/teena...

There have been reports that young people without other complications are not dying from coronavirus. That's why reports of someone young and healthy dying of COVID are getting attention, because it runs contrary to what has been widely reported.