I suspect the number one reason is that most 18-25 year olds actually love their parents and grandparents, and don't want to see them dying an agonizing death f

I suspect the number one reason is that most 18-25 year olds actually love their parents and grandparents, and don't want to see them dying an agonizing death from covid. Clearly this doesn't apply to everyone, but I reckon it applies to most.