The worry isn't that their health is always bad. The worry is that if they do happen to have something happen, whether that be disease or injury, they won't be

The worry isn't that their health is always bad. The worry is that if they do happen to have something happen, whether that be disease or injury, they won't be able to afford to go to the hospital or visit their doctor. And death isn't the only negative outcome from not getting medical attention, it could be permanent effects like constant pain or reduced physical ability.