Negativity exists outside of your own perception of it, or in your terms, ignorance is bliss.

You can always choose to believe things will be good, but after a certain point it stops being a belief and is moreso a mental illness that requires medication. When reality and your perception diverge too much, you can believe anything.

In the current economic systems, AGI would bring about mass starvation, war, and enslavement. We would require a complete destruction of capitalism to make AGI not the worst thing to happen to humanity since the black plague. Now, look at our leaders. How likely is that?