It's doom and gloom because the underlying game theory forces all state actors into an unbound and irresponsible arms race, consequences be damned.

AI development game theory is extremely similar to the game theory behind nuclear arms development, but worse (nuclear weaponry was born from Human General Intelligence, and is therefore a subset of the potential of AI development). Failing to be the most capable actor could put one in a position of permanent loss of autonomy/agency at the whims of more capable actors.