Can you point out to me in his quote what exactly you claim he understood?
"A quantum state can be much more complex than that, because as we know, things can be both particle and wave at the same time and the uncertainty around quantum states allows us to encode more information into a much smaller computer."
Not sure what you mean here? He spent some time learning and asking questions to some very knowledgeable people in the quantum computing field. Are you trying to imply that he somehow despite all the time he spent that day did not learn anything at all about the quantum computing field? PR stunt or not he spent a good amount of time with these people and I don't see how he would not have learned anything there.
