I'll watch it later but if the debunker is heavily Christian I don't know if they'll be right either. There's a lot of evidence now that elements required for life have come off asteroids in the past which I'm sure he won't mention.
But yeah i don't think anyone takes ancient aliens seriously do they? It's an entertainment show, but it's pretty sad the history channel shows stuff like this.
he may also have meant this-- that both wordings come to the same thing in peoples' minds.
therefore, maybe it's not really so "irrational."
Whatever he meant, it is 100% irrational to use totally unprovable (not to mention ridiculous sounding) entities of a mystical, magical or 'highly / "Alien" technological' power as a write-off for things you do not understand.