When you consider that Zuckerberg lies all the time about everything, it makes sense
His public blabber on ai and automation are a great peek inside his mind.
The mindset is "That problem isn't solved because I haven't worked on it yet." There's no self awareness or humility involved, and he can afford the apparatus to maintain that for the rest of his life.
It's very difficult for those with ethical and moral standards to grasp that there are truly nasty people out there.