Really? how so? You do understand that most of us make a pack with the avatar that the beastman can Summon. SE said that we could later summon them by doing a chain of quest. Then you allow to use there powers in battle. If you ever did the high rank mission one of them talk to you and say you have gods but can't summon them? You most make a pack with me and don't talk to the other avatar or something like.

It's clear that the storyline could allow you to use them if you learn them for the beastman also SE said we later could learn from the beastman spell,craft items, and much more.