With minimal reading comprehension you could have inferred that the assistance in the example was breathing for the person since they would suffocate without the assistance.
Im the hopes of avoiding a similar stupid post, that does not mean I think anyone who need needs a machine should die. That was an example of a situation where doctors can currently let a patient die through 'inaction' by removing the assistance that is taking care of vital functions like breathing. Think brain dead people or someone whose cancer is so bad that they refuse care that could keep them alive, but have no option to end the suffering faster.