Nice attempt at segue between an ongoing discussion of convicts receiving vaccine, (implication being convicted) vs those in remand (awaiting sentencing)
Being that you want to move the goalposts in the discussion should I consider that as conceding?
I have no idea how you equate the bolded. Kids, youth potentially contribute to society, and on sheer probability of impact, they do. the vast majority do. Similarly in the case of seniors the vast majority have been benefit to society. Neither group being incarcerated, against their will, due to criminal action.
In anycase youth contribute to society by going to school and building potential further to making direct societal contributions. Many students make direct contributions to society while in school years.
Seniors contribute to society similarly to how elders do in first nations cultures, and through their support of younger generations, rearing of same, financial and other supporting of them, guidance, learning, etc.