It's not "sound", because when do we ever have the perfect world? Instead we have a world controlled by self-serving billionaires like Altman. The perfect world is a red herring.
If you're ever tempted to grant the benefit of the doubt to our tech overlords, please read "Careless People" for example.
I find it odd that you're going out of your way to defend an argument as "reasonable" that by your own admission "isn't really based on reality." I think it's actually more charitable to Altman's intelligence to interpret his argument as self-serving than to interpret his argument as somehow just ignorant.