From their perspective, it actually makes more sense for us to do as they ask; should time be rewritten as they desire, the United Earth would never get the idea to invade other worlds in the first place or have the means to do so. It's two birds with one stone.

Have they forced people to take part in missions? Even those not able to defend themselves?

[A genuinely curious inquiry; he realizes he sounds a little pro-initiative right now, so he's trying to tone it down a little. His loyalty is just as removed as everyone else's, really. Maybe even moreso.]