> You’re not talking about a transcendence, or at least, not one that I recognise.
Does the gap scare you somehow? Why?
Any artificial biology (and whatever hosts a live human spirit automatically becomes a life form - thus, a biology) is entirely our, human product. If it's not ours, whose else it is?
> Our biology is an innate part of us - to improve, to fix, sure, but not to cast off.
I agree that our biology is 100% innate part of us, as we are today - we are layers upon layers upon layers. But some parts of some of those layers are inadequate for who we're trying to be as a society. And many of those had appeared way before a human pronounced first words ever.
We'll never be at peace with what some parts of us are doing. We'll continue to cheer for punishments, and demand those relative to our feelings about the act rather than consequences. Our moral judgements will keep piggybacking on our pathogen-avoidance machinery, ever prone to abuse by those who seek wars. We won't collectively overcome our unconscious contempt for low-status. We'll be bound to self-deceivingly conform to beliefs for loyalty signaling. We'll keep tending to pursue short-term gains even if they clearly contradict our future goals. And so on. YMMV, but I hold no allegiance to any of those machinery. It's very interesting how it all came to be, but there's nothing beautiful about the results.
If we can "fix" it in our current biology - that'd be wonderful too, although I suspect that it could be impossible without creating a whole new family, separate from apes. Possibly a lot deeper. At which point it's probably "traitorous" all the same, unless you hold some allegiance to DNA-based life in general.
I guess, we can try slapping on new circuitry that overrides old one. But why pile up hacks? We have plenty piled up already, and most don't benefit us. Not to mention difficulties of mixed-biology reproduction.
So, a new organism doesn't strike me as treason, as long as it replicates all the good parts of what makes us human. The darker rest can carry on in (trans)our cultural layers, as historical tales of how we were in the days of old, no longer an active factor in daily lives.
> Who is directing this “transcendence”, and who benefits?
You're asking who's directing a hypothetical? Hypothetically, no one. Or, better said - evolution, as always. It developed a few interesting mechanisms: tool use, language, reasoning, now through those it starts to dabble at different biologies.
And the Life itself benefits. As it always did, from diversity.