When someone is no longer treated as though they have a shred of humanity in them, they become easier to attack. It’s the same reason people often use the phrase “born a man” to describe trans women. When someone has a baby, finding “It’s a boy!” and “It’s a girl!” cards is no problem. I ask you to try to find a card that reads, “It’s a man!” You can’t. It’s for this reason that trans people are treated as though they never had the innocence brought on by childhood: it’s easier to attack someone if you don’t view them as ever having been “pure.” When it comes to morally justifying emotional and even physical attack, a man will always be easier to attack than a boy; a woman will always be easier to attack than a girl; a t slur will always be easier to attack than a human being.
I'd never considered that implication of "born a man" before.