I am talking about raw scientific possibility, and a good rule of thumb is: if you see it in nature, then it is assuredly possible, and humans will eventually do it a thousand times better.
Cold fusion: Does not exist in nature. Only exists in (controversial) theory. I'll believe it when I see it.
Hot fusion: Exists in nature so it's possible. After developing the technology, humans will be able to do it better. Will take a while.
Flight: Exists in nature, so it's possible. After developing the technology, humans can do it better. Took a while.
Intelligence: Exists in nature (ie you and me). After developing the technology, humans will be able to do it better. Will take a while.
See the pattern?
From an energy conservation perspective nature is perfect. It is impossible for humans to do better than nature when it comes to conserving energy, which is a pretty key problem, so it seems a little optimistic to think that humans can do 1000X better than nature at very many things (or any?).
I don't understand. Energy is always conserved no matter if it's nature or humans - literally the first law of thermodynamics. Nature, humans, aliens, anything else is all "perfect" so I don't understand your point, or its relevance
I am suggesting that the assumption that humans are generally able to do 1000X better than nature may be flawed if nature can already do the most important things so well.
I don't doubt that you have well-intentioned beliefs, but before stating them again you need to withdraw and figure out how you can state them in an understandable way. When you've done that, come back and we can talk. I am saying this with the best of intentions btw.