That's just so heartless. Someone not able to prioritize housing and food over for example drugs has a very serious problem and needs help.

People in that situation are still human and are not doomed. People do recover from such ailments all the time given the right structure and support.

And if they can't recover they still deserve the support. That's our responsibility to each other. When "personal responsibility" means just letting people suffer and die we should leave it behind.