There are many technologies that have not been a net positive for humanity. Leaded gasoline comes to mind immediately. For many other technologies it is also hard to determine because counterfactuals are hard to reason about.
Even then past performance is not an indicator of future results. Just because you think internal combustion engines were a great invention, doesn't mean AI cannot be bad for humanity.
We still use leaded gasoline (100LL) in prop airplanes today, for what it’s worth.
So it’s not clearly a net-negative technology.
I wouldn't say that leaded gasoline is a great technology like AI, it's a pretty niche tech. Gasoline in general is comparable to AI, and the pros of that outweight the cons. Modern civilization would be impossible without gasoline.
>Even then past performance is not an indicator of future results.
It is not perfect or guaranteed, but it can definitely be an indicator. Technological progress is the main reason for the massive standard of living increases that we have witnessed in the last ~200 years. If someone wants to argue that this trend will stop or even reverse, they need very strong arguments, IMHO.