Because the only thing we know about this character is that she is a woman, not “a Lieutenant” or “his wife” or “his physician.” If the betrayal is from “his lieutenant,” we can imagine all sorts of lieutenant-specific reasons to betray: power, “frag the lieutenant”-style incompetency on the part of the hero, shifting alliances. If the betrayal is from “his wife,” then we wonder what issue was so great that it sundered a marriage. But nope; it’s a woman, and what are women in that case but generic betrayers?

— Ferrett Steinmetz on the phrase “Samson was betrayed by a woman”.