They aren't openly euthanizing depressed people for being depressed. They have to have a physical health issue that will not foreseeably improve. If the issue won't improve because of depression, or poverty, or our medical system's failure, or you are refusing treatment, then the state will euthanize you.

We recently had a guy get out of the psych ward on a day pass and he went off and euthanized himself. On reddit, the crowd went wild and it was regarded by many as a triumphant exercise of self-determination. There is a death cult amongst liberals and many of them want this even for people who are currently being treated as threats to themselves and others.