I agree with you that the context eliminates MBZ but I don’t see Zuckerberg as having the gravitas for this level of meeting unless they had him up against the wall and told him to talk or else.
He’s a lightweight who was made rich by Wall St. in return for acting as a stooge for bad actors.
I agree that Tillerson and Zuckerberg have no common interface to discuss anything.
So either Zuckerberg is miscast as MZ or Tillerson as RT.
Zuckerface may be a lightweight in whatever way you mean, but he is filthy rich and is the CEO of FB which has been highly influential and has used censoring and all manner of dirty methods to push commiepukedom.
He became rich by stealing farce-book from the group that developed it.