I don't either. I think it was a convenience he & his lawyers thought up to get him out of the public eye by whisking him off to "rehab" (in some unspecified location). MOO.
It’s so that he can take the blame off of himself and on to the drugs. That makes him not guilty and the drugs guilty. He’s the victim, the drugs made him a victim.
Furthermore he got addicted from pain medication. There are true victims that get addicted after a pain inducing injury or surgery but that’s not him. It’s a lie and an excuse for him.