So not really linked to leading a healthy and fulfiling life then?
Well that too, the damaging effects of poverty: The whole gamut of nastys – poor health, social disorder, mental illness, addiction, child mortality, criminality, victimhood, and much more are tied to inequality. While its not true to say everyone of modest means is harmed by their modest means the threshold tries to represent when and where that damage occurs.
Not all the consequences of poverty effect the poor, some of them are problems for everybody. If we could eleviate the effects of inequality it would be better for everyone.