Earlier quoted context omitted.
'The "evil" AI and safety stuff is just science fiction, but whatever.' umm... you can offer proof that we have nothing to worry about? Does the proof go like: Just as all people are inherently good, therefore all AIs will be inherently good? Or is it more like: since we can now safely contain all evil people, therefore we will be able to safely contain evil AIs? Sounds to me like there is some risk, no?
As I've said many times on HN over the years, there is currently no clear path to science fiction like "AI". To return your question, hopefully without being rude, is there any proof that AI capable of having a moral disposition will ever exist? Andrew Ng (I believe) compared worrying about evil AI to worrying about overpopulation on Mars. Which is to say, the problem is so far off that it's rather silly to be consid…
Given that I could probably sketch out a half-assed design for one in nine months if you gave me a full-time salary - or rather, I could consult with a bunch of experts waaaaaay less amateurish than me and come up with a list of remaining open problems - what makes you say that physical computers cannot, in principle, no matter how slowly or energy-hungrily, do what brains do?
I'm not saying, "waaaaah, it's all going down next year!", but claiming it's impossible in principle when whole scientific fields are constantly making incremental progress towards understanding how to do it is... counter-empirical?