Not exactly correct. If you listened to his monologue you heard him say that he DID try to kick the habit, unsuccessfully, because he didn't spend enough time in the rehab program. This time he is going for the full monte.These 12 step based programs last about 4 weeks and are extremely intense. In addition, you are, just like an alcoholic, never completely free of the drug dependency and must remind yourself every day that you are an addict and can't go near the stuff. The failure rate is very very high. I wish him every success and I would hope that you would too. If you had the problem you would know what I mean.
I doubt that many of Rush's libertinarian dectractors on FR have listened to his show, let alone today's broadcast.