disabled people are worth whatever cost or resources is needed to keep them alive. disabled people are worth it even if they don't live long. they're worth it even if they will need extra support and resources for every day of their life. they're worth it even if they spend all they life indoors. none of it is wasted. none of it is in vain. time, effort, money, resources spent on a life are not wasted. these things have served their purpose. the joy of someone's existence is not undermined by not lasting forever. there's no meaningful point, some threshold where you can say "okay this is enough. after that it's not worth it." it's always worth it.
say what you will about political genius cersei lannister but history will remember her progressive reforms (inventing the idea of firing the kingsguard, elevating bastards to the small council, probably like doubling the funding to STEM research between qyburn and the pyromancers, setting the tower of the hand on fire, etc.) thats the first queen of westeros and its first ever ruler to not have any targaryen blood (unless).