Not trying to defend Jeff here, but generally these kind of space megaprojects rely on manufacturing materials in space. I.e. capture an asteroid and use its material as the radiation shielding. Not that that’s currently anywhere near feasible ¯\_(ツ)_/¯
Thousands of military drones have been remotely piloted for decades. This news isn’t as ground breaking as it might seem. Some of these drones are large: https://en.m.wikipedia.org/wiki/Northrop_Grumman_RQ-4_Global_Hawk
I know a military drone isn’t the same as a passenger carrying airplane, but for cargo I think the only reason this isn’t already a thing is because drones are military tech and most governments don’t want that falling into the wrong hands.