Doesn't he say right at the start that basically nobody is pricing this stuff in right? Becoming an investor makes a ton of sense if you earnestly believe that.
I guess one could make the argument that wealth will be useless in a post-scarcity scenario, so why not spend for today. But, and this might just be me speaking, I sleep a lot better at night now having some nonzero amount of money invested and going to work for me one way or another.