There's a lot of "but why don't they stop if what they're doing is so unpopular?" comments and I've got one more explanation (on top of the obvious money and technofaschism points).
A bunch of these tech CEOs are part of the "Rationalist community" and possibly believe in Roko's Basilisk which is a thought experiment that an otherwise benevolent AGI would punish anyone who didn't actively work to bring it about. Someone want to link the BtB episodes about them? I know the Zizian episodes go into it but iirc they've got a dedicated series about these weirdos.