I found the OP to be an earnest, well-written, thought-provoking essay. Thank you sharing it on HN, and thank you also to Dario Amodei for writing it.
The essay does have one big blind spot, which becomes obvious with a simple exercise: If you copy the OP's contents into you word processing app and replace the words "AI" with "AI controlled by corporations and governments" everywhere in the document, many of the OP's predictions instantly come across as rather naive and overoptimistic.
Throughout history, human organizations like corporations and governments haven't always behaved nicely.
AI might fix that. We could have an open source one with some be nice rules to run things rather than corrupt humans. You'd still want to be able to vote it out and swap in a replacement if need be. I think even chatgpt 4 might do better than our present politicians.