Breen was right. "If the transhuman forces are to prove themselves an indispensable augmentation to the Combine Overwatch, they will have to earn the privilege. I'm sure I don't have to remind you that the alternative, if you can call it that, is total extinction – in union with all the other unworthy branches of the species. " The combine successfully invades Earth in 7 hours, and could have easily wiped humanity off the planet. It's either die or live to become one of 'them' and hope to god something big happens to save you before the combine find the secret to in-universe teleportation. What other choice does he have than to buy humanity precious time?