I think I finally picked up on the fact that, while what #Mettaton tells you is more or less true, the big pink egotist is also an _actor_, perfectly capable of writing himself into a heroic role. I am certain that this is what he promised Alphys, the night that he discovered his old friend's precious stash of fanfics about befriending a fallen human and saving them from the hazards of the Underground and becoming best friends. For Alphys also loved humanity and its culture and its science and its technology—and Mettaton promised to be the stage director who could make that promise come true. She dreamed, but HE enacted it.