No one would opt into volunteer to be in the second group. But, I can see a lot of, e.g. 50-year-olds, taking a risk thinking they can refill the college-education funds and retirement funds by just working longer than they intended.
I would imagine when dying one of the comforting thoughts is that your estate will continue being able to care for loved ones after you are gone.
But in general for the larger point, we should make sure that people can fight to live, but that assholes aren't stealing from them by selling magic beans.
Sure, why couldn't it be? Maybe it has severe, painful side effects. There's a reason many people with stage 4 cancer and low chance of survival decide not to go back on chemo. Maybe it kills them earlier than expected. Then what?
With the modern social safety net, perhaps the traditional protections can be relaxed.
Of course some here would view that as a positive.