Why is Robyn the spokeswoman for the religion?

I am so over Robyn acting like she knows everything about the religion and how everything was BEFORE she came in like a wrecking ball and destroyed the family!! She talks like she is the absolute expert on polygamy. She has NEVER lived polygamy so how does she KNOW that's how it should be? I'm rewatching the show and I am so over her speaking like she is the expert on whatever topic she is talking about!