If the harm is so great to all of society, then surely all of society would ensure that no one ever has to even think about cutting any treatments short.

Or, even if it's just the knowledgeable and responsible medical profession who knows how important that is, then surely that same knowledgeable and responsible medical profession would ensure that no one ever has to think about doing something they claim to care so much about avoiding. Right?

This responsibility to others argument falls dead flat.