No, it’s not a fuck you to Michael J. fox, why would you say such a thing?
Do we know if the story is true. Shaking from DT’s can look like Parkinson’s. Someone might be making it up after seeing him while he was still drinking.
Even if it is true, between his depression, struggle with addictions, and now a diagnosis with a progressive disease, maybe he just couldn’t take the idea of one more thing to deal with.
One of his best friends was paralyzed from the neck down, maybe he thought he would have been better off dead? We don’t know. From what I understand he didn’t leave a note, which I find a little odd, but maybe he didn’t want it published, or maybe there was one and the family kept it.