What's the choice? Make other people ill and have the original sick people die anyways?
That's all slowing mortality down in heroin abuses does, and it's definitely not how we treat other kinds of diseases, particularly those which have reached epidemic proportions, where the prime objective is arresting transmission.
So, yes -- I think we should follow standard medical practices, and it's unfortunate that strong measures are needed to confront an epidemic level problem. Just like it always is when you have to make medical triage decisions.
But we have to prioritize maintaining the healthy population ahead of the comfort or longevity of the already ill, in broad strokes.