The reason why good ayylmaos are helping is because they cannot stand idly while fellow conscious beings suffer. That's why you see UFOs around and that's why you have people that supposedly have contact and are spiritual and whatnot. They always respect free will.
Then we'd be conquered and stripped of resources a long time ago
we'd have been*
Why would someone leave angelic realms and voluntarily descend into this world of separation if not because of love for his Earth friends. Such love that you'd share their fate by becoming one of them. This fate will now be glorious.