I don't believe you need to distance yourself from an Addict IF the Addict is working on getting straight.

If they don't want to change - then that is a different story.
You would have to be willing to live with their bad behavior and for most that would be very hard.

You CAN set boundaries and live with someone without enabling their addiction.

I think distancing yourself for some Addicts would feel like abandonment or betrayal and this may push them further into Addiction.