So many analyses seem to compare the potential output with what is now being used, but just look around - especially at night - and you'll see that HUGE amounts of energy are being wasted on poor insulation, lights left on, heating large, deserted spaces, etc., etc. Renewable energy, YES! but we also need to seriously reduce our usage.
And just exactly which hands are the right hands to wield lethal weapons? I don't know, I'm not inclined to accept this person's (or anyone else's) opinion about who are the "right" people. But then, I'm just not a big fan of shooting people.