Regarding commercialization of suicide: I think you're missing my point entirely somehow. The "societal" issue where old people are unwanted already exists, and it will exist irrespective of any innovation of this kind. Moreover, old or terminally ill people already have full control in terms of whether they choose to live or kick the bucket. There's nothing whatsoever anyone can do about that. Tens of thousands of people in the United States take their lives every year. It's just that if they care about their loved ones (if any) the logistics of dying are horrific. I wouldn't want to subject anyone to that, but I'm afraid if I were terminally ill, that'd be a pretty shitty reason to continue living, and make everyone I love suffer with me.
> The death penalty does not exist to reduce the suffering of the convicted
There's an easy way out of your moral dilemma that you go into after this sentence, much like what I suggest for those on the outside: let the convicts choose whether they want to suffer for the rest of their days in prison, or be humanely and painlessly killed. I know which way I'd go, under the circumstances. And yes, I do insist that the killing must be humane, dignified, and painless. We have the technology to ensure all three of those things.