@joeylittle that's a good question, not sure if I have an answer though, which is why I asked here. I can only say, I think of all people as being equal & having a core value. Irrespective of their choices.
That being said, the closest analogy I can come to is this one: for old people (seniors, & even for each one of us), I've frequently thought as regards their 'age' they're only as old as their youngest connections (& by that I don't mean on paper but in true close relationship). So for example if they spend time with people much younger they themselves have some speech, thoughts, vibrancy, energy etc more characteristic of youth. Consequently, at their death the impact is huge & more reaching than for those who do not.
So in a sense to me value may not be defined by but encompasses connection, impact; roles, etc. Although as I said I don't really know. But others here say the same thinking, eg 'if it were not for my kids' etc. So perhaps it's the value of their children that impacts them, +/or their identity as a parent.
I think society guages value to a great degree on output, standing, roles, etc (& of course powerfully though superficially appearances , etc). On one hand a person doesn't have to subscribe to that as the totality, but on the other hand what do you subscribe to your life in the absence? That I do not know.