I would also caution with the old adage, don't knock it till you try it. Life in extreme pain is no life at all. Calling on Jesus isn't going to suddenly make excruciating pain more bearable, especially for someone who doesn't believe in Jesus. Maybe toughing it out for a few more weeks or months is worth extra presents in heaven, but unless we have some evidence of that, I think it would be grossly irresponsible, indeed evil, to legislate it. It is, in my opinion the equivalence of torture.
Just don't push it to others under the name of morality out other bullshit.
I would like to be able to die when I want to, in a simple and painless way. Because I will do it anyway jumping under a train or lorry it is just messy for everyone.