[eppp]

Because old people exist it is now the duty of the unborn to care for them? That is so sad.

[gattilorenz]

Because the environment exist it is my duty to pollute less? That's so sad! /s

We do this all the time, including with debt, pensions, etc. Once born, the currently unborn have the choice to take care of their parents or not, to decide en masse not to become a doctor or nurse, to emigrate to a different country without a pension system (or to just be jobless forever to avoid paying for that)...