Which closes the circle, nature already invented all that: your kids are a version of you that's free from both the baggage of harmful mutations and the baggage of harmful presuppositions.
Not at all clear to me why we want to reinvent an inferior version of this process, it works remarkably well.
That sounds like something that someone who is not open to change would say.
Not all change is worth accepting, but if I'm wrong about this one my death will eventually put an end to me being wrong.
It's not scary to make a mistake if any decision you make is temporary anyhow. Knowing that I die no matter what I do with my life gives me so much more freedom in how I can live it.
The second sentence deserves some response, but I don't know what to make of it. Mistakes are good, surely? More mistakes faster. Well, I suppose you mean something like life-ruining mistakes, but in the first place I'm not sure there really can be any - unless you have a low threshold for "ruined" - and in the second place, immortality gives you endless hope of staging a comeback.
Literally everyone operates within some framework of unprovable dogmas to be able to tell good from evil and to decide how to act. Accepting that fact is a IMO a better path than striving for some sort of non-existent objective skepticism (but that's only better within my framework of what better is, of course).
And surely I worry whether I'm right, and all the time. It's just that when I worry and estimate the expected value of my decisions, I don't get NaNs and INFs. My life is not infinitely valuable to me, engaging in activities that involve possible loss of my life is often a good decision because the upside is good. That's largely true because I die anyway, I'm not sure the same calculations would hold if I were immortal.
UPD to respond to the second part that was added later
> Well, I suppose you mean something like life-ruining mistakes, but in the first place I'm not sure there really can be any - unless you have a low threshold for "ruined" - and in the second place, immortality gives you endless hope of staging a comeback.
It's remarkably easy to ruin your life by dying or getting a permanent disability. Would you climb a mountain with a risk of avalanches and rockfalls if you were otherwise immortal? Even commuting to work by bicycle becomes questionable, chances of getting hit by a car on a crossing are pretty high compared to taking the metro.
More to the point, you can refrain from being unnecessarily dogmatic. As I'm sure you do really. But that means anticipation of death, to wipe out your ideas, shouldn't diminish your will to filter them through argument or thought. It just acts as a safety mechanism against your possibly losing your grip on rationality and becoming an intransigent old nuisance, I suppose.
So the second point is that self-sacrifice is less expensive for the mortal. I guess that could be seen as a rather cold fact that a mortal person is less valuable. But immortal people could be hindered by being all neurotic about risks to their lives, if that even is how we make decision about self-sacrifice and mortal danger (however mild - germs?) ... but I suspect that isn't a calculation we'd do, even if immortal. I suspect the basis for these decisions is something different. This makes me scratch my head, I may come back to it.
If the answer is "No, they don't," then it follows that part of progress is newer generations moving into positions of authority and bringing their new ideas with them.