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

[Excited Penguin]

Ok, let's lose the term immortality for a second. Think of it more as advancements in medicine that allow you to live longer. Except it's forever. You're still mortal though. I will still be able to shoot you dead, unless we somehow change our bodies with nanotechnology so that we become truly invincible, or we find some other way to preserve our conscience only to then upload it in a body of our choosing, or in a simulated reality or in our old body that's been fixed in the meantime. But that's highly speculative and not exactly as likely as us solving the ageing problem - not even close.

Secondly, I would be having fun too, no question about it. But I think if you truly started to think about the dangers we face as a species, and you had all the time in the world to do that, technically at least, you would want to do something about it too. Anyone and everyone who would want to prevent death by disaster or accident would too.

Pretty sure a society which can "cure aging" isn't going to have trouble with gunshot wounds.......

We -do- have all the time in the world, or at least all the time in the world allotted to our species (whatever that may be).  People were doing science before you were born, for example..they're doing it now, and will continue to do it beyond your death.  I'm already doing something about the troubles we face and immortality isn't a requirement for me to do so..nor, being realistic about my abilities and importance...would my being immortal have significant impact on that.  Personally, and this is opinion..I see the exact opposite.  I'll keep the mill turning for my time..but at some point I have to get out of the way, if..for no other reason, so a fresh set of eyes can look at the problem.  Stagnation, imo, is what would come of immortality - among other things.

You're simply confused. You seem to appreciate reproduction over survival, which is insane, since the whole point of reproduction is survival. I think your concerns are laughable, and while you're worried about stagnation, I worry a lot about your being closed-minded.

Unless, of course, you're not really serious, which I expect you're not. Being too skeptical as a matter of principle can be a really bad thing.

I think we're done here.