[TeMPOraL]

> A longer lifespan than that doesn't advance our reproductive fitness, and so we're not designed to live any longer than that. So even if we could tweak our bodies to live longer, it is not a foregone conclusion that this would be healthy for our minds and souls.

It's also not a foregone conclusion that this wouldn't be healthy for our minds and souls. The problem with death is that it's irreversible. At any point, you can decide you're too bored or too miserable, and end your existence. But once that decision is made - usually for you - it cannot be reversed. So it's better to err on the side of more options, i.e. more years to live.