He already does.
He's a Vegan.
I guess I don't feel I need a Doctor or a Legislature to tell me when and how I can end this mortal life. I'll figure that out for myself if and when the time comes.
Not everyone is so lucky as to be able-bodied and able to obtain the means when they discover that time. Many people wait until it's too late to do anything without assistance, and because physicians see this a lot, perhaps that's why many of them make preparations to go while they still can do it (often planning to use carbon monoxide).