I am not a fan of the magical quick fix in any fiction, including fantasy, scifi and comic books. Unless Dr. Who is involved, and then only because we get to use the phrase 'Timey-wimey wibbliness' which, I'm sure you'll agree, there are not enough occasions to drop into ordinary adult conversation.
Deus ex machina not only erases all meaning and emotion, it's an insult to the audience. Each of us knows we must choose and act, for better or worse, to determine the meaning of our lives...Deus ex machina is an insult because it is a lie.