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.
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.