SBF said if he had a die and it had a 99% chance of killing everyone and a 1% chance of making the world 1 million times happier he would roll the die. Repeatedly. And Silicon Valley loved him.
I think AI is a similar calculation. Humans are tearing themselves apart and the only thing worth betting on is AI that can improve itself, self replicate and end scarcity. I believe that these VCs believe that AI is the only chance to save humanity.
And if you believe that, the net present value of AGI is basically infinite.