"The first person to live to [200, 300, 500, 1000] has already been born"

[Excited Penguin]

And you think that is the moral thing to do in that situation?

Do i think the moral thing to do is give a sick man medicine and not eat him?  I;m starting to wonder what rock you crawled out of.

Of course it's a thought experiment, your thought experiment, in which you control the variables.  In your thought experiment, the only choices are death or depravity, and you seem to be taken aback that anyone would choose death.  You should have known that before you started in..when I said I'd rather die than castrate those who disagree, and asked you to hold a bandolier of ammo for me in my hypothetical insurgency against anyone who would choose the former over the later.

The sick man will die either way. You wouldn't be killing him, if you chose to withheld the medication. That's the crucial difference. You would be saving two lives instead, at the expense of none. The only price you would have to pay is to degrade yourself in that manner.