I actually agree with this. If they are no longer an actual threat to society, why do we keep them locked up?
Sure, there are arguments for specific individuals, and maybe there should be a way to appeal to keep them locked up, for example if they have been violent recently, or were criminals that don’t rely on physical ability at all (criminal masterminds or something).
But on the whole, elderly people aren’t a threat to society and cost taxpayers significantly more to upkeep due to their medical needs.
If they have family or an organization willing and able up upkeep them at least as well as the prison is doing, release them. Seriously, what do we gain?
Then again they might run for government, like trump or Biden (both laughably geriatric)…