To nitpick on your throwaway Ringworld reference, that’s exactly the opposite of the point. Other humans don’t benefit from the fact that the Ringworld is going to shield Teela Brown from the core explosion. She would be the person who accidentally bought zoom stock in January because it sounded like a cool company name, or the immortal baby from an unreproducible biomedical research accident that is prompted by post COVID-19 research funding, probably extra lucky to be living in a mostly-depopulated high-technology world due to massive death tolls from some other disaster.
To nitpick on your throwaway Ringworld reference, that’s exactly the opposite of the point. Other humans don’t benefit from the fact that the Ringworld is going to shield Teela Brown from the core explosion. She would be the person who accidentally bought zoom stock in January because it sounded like a cool company name, or the immortal baby from an unreproducible biomedical research accident that is prompted by post COVID-19 research funding, probably extra lucky to be living in a mostly-depopulated high-technology world due to massive death tolls from some other disaster.