I think that you and I are talking past each other, to an extent.
The elderly have the duty to protect themselves.
When The State intercedes, and says that I have the duty to alter my lifestyle, submit to vaxxination, etc. - in order to protect someone else, THAT'S where tyranny begins. And I don't think that you or I wants that.
(You, on the other hand, are probably speaking of a person protecting his elderly loved ones - which is another thing entirely.)
Regards,
Yup, individually, as a responsible, free will individual, not a drone of the state.