Emma Watson’s speech on gender equality at the UN got a lot of attention, and that’s great. The more that hop the feminism train and use their platforms to spread the message, the merrier. But there’s a tiny little thing I’d like to disagree with her about.

The thrust of the speech is about getting men on board with the mission of gender equality. Watson said: “How can we affect change in the world when only half of it is invited or feel welcome to participate in the conversation? Men—I would like to take this opportunity to extend your formal invitation. Gender equality is your issue, too.” That last part is true. In fact, I’d say ...