Reality doesn't care about how things should be.
Framing it as unchangeable "reality" is intellectually dishonest.
...and what is the implication here? After I broke a bone, I was given a choice between surgery and a cast. I chose surgery - which cant be undone - and I half-regret it because when I bump into things and the titanium bits transferred the force straight to the bone, resulting in exquisite pain. Should I have been denied surgery because it can't be undone? I think not; I was given the choice, I hose what I thought was best. Did I make the correct choice? Probably not, but it was my choice to make, and expecting a system with 0% regret rate is impossible.
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.