Like everything else, it's only good up to a point!
- I believe in basic medical care, but medical technology that permits immortality is bad.
- Likewise, is reducing mortality always good? Now we have extreme overpopulation. In short, reducing OUR mortality has also INCREASED the mortality of non-human animals, which I believe have just as much right to live as us.
- Fertilizer and agriculture? Most industrial fertilizer poisons the land and agriculture has eliminated millions of acres of wild forest and destroyed a lot of ecosystem. Agriculture is also responsible for the huge population growth that is causing global warming.
- Cure for cancer? Maybe good, maybe bad IF that cure results in significantly extended lifetimes due to how it works.
I do have MANY more nuanced answers. That is why I believe in looking at each of your points AND others individually. My answer was specifically directed at AI, which I believe to be universally bad.
Most of the technologies you listed have significant negative consequences, and it's not clear to me that those are outweighed by the positives, especially if our modern society results in the destruction of the phytoplankton of the ocean producing half our oxygen.
I suspect in the long term, it would be better to have more mortality, smaller populations, and less technology than our current world. It's not a popular view because people are emotional about such things, but it's hard to imagine how a world with 8+billion and mass eco-destruction to be better IN THE LONG TERM.