Parkinson's Disease has a really high misdiagnosis rate (25%) and progression to more debilitating stages doesn't necessarily happen quickly.
He could have lived a very comfortable life for a few years at least, I'd probably wait until I was at least in Stage 2-3 before I'd consider ending it.
Suicide still seems odd to me, if he wanted to check out of reality he could have spent the remainder of his days in a drug induced haze, comfortably numb on some white sanded beach.
I still don't get why successful people commit suicide out of depression. When I think of reasons people commit suicide out of depression it is one or more of the following reasons:
1. Sense of failure and lack of self work - Not applicable here, guy was highly successful and had the power to continue making meaningful and long lasting impact on society.
2. Sense of feeling trapped or seen everything life has to offer- Not applicable here, guy could go anywhere in the world and do almost anything he wanted at a whim.
3. Loneliness - Not applicable, this guy could have hung out with anyone he wanted. Not just dumb vapid whores, but probably royalty, prolific scientists, explorers..anyone almost.
4. Neurotransmitter problem or other neurological abnormality - Depression without a legitimate social or moral reason certainly manifests, but treatments for this are pretty advanced. Particularly if you a world famous, well connected actor that has no responsibilities beyond being a father, there are plenty of treatments to address chemical imbalances.
5. Depression leads to illicit drug use - In that case they should say died due to the influence of drugs. When a depressed man goes on a PCP fueled rage the news says he got gunned down by cops while under the influence of PCP, not because he was depressed.
As far as I'm concerned, with all of the horrors people endure in this world and come out intact, suicide due to depression by successful people is a bitch move. If people want to kill themselves more power to them, but if they are in this guys position it is jaded and certainly not heroic.