That's not the point. Has nothing to do with song writing or type of musical material.
Many addicted jazz artists never went to rehab. A good number just died prematurely.
FWIW, I believe she has now gone to rehab., for whatever good it will do.
I know she's a substance abuser, but I don't recall heroin being the offending drug.
Did you stop listening to Miles, Getz, Trane, Mobley, Blakey, Sonny Clark, Warne Marsh, etc., etc., etc. until they cleaned up? I didn't.
If one doesn't care for the music, that's fine. I just don't believe that lifestyle should determine who you listen to, read, or even the paintings you look at.
jazzshrink (or anyone else) can use that as a determining factor. I don't.