That's a great way to put it Brenda -- the show is a parable.
I wasn't one of those "saved" early in life, homeschooling my own kids, etc. I spent decades arguing with God out loud and to myself because the stuff Christendom was trying to pass off on me just made no sense at all. My life wasn't quite as wild as Grace's but...well, I'm sure you can use your imagination, haha.
I was a complete hard-headed rebel throughout my life and I see myself reflected in the journey my own kids are taking. That's why I relate to the story of Grace. I also relate to the writers of the show who are asking the same questions I asked but it's just not their time to get all the correct answers yet. I had to wait almost 48 years for those answers while banging my head on the door confused by all the false doctrines that made no sense.
Unlike a lot on tv though, this show is asking the questions. It doesn't shy away from many Biblical references but it also doesn't show the truth as we have come to be shown by God. It's where I was for 48 years. I can relate to that.
It would be very hard to be a police officer and see the evil they see every single day and not believe that the God you've heard about is a hoax of self-righteous delusional people -- which that god is. Sometimes it is still very hard for me to hear about the evil in this world and completely understand. The faith I have that God's plan and purpose are in control are all I can fall back on when I feel like that.
Anyway, I really enjoy this show but it's "adults" only for sure. I don't mind seeing the pure carnality of man when there is a purpose. Probably why my favorite movie is "The Three Burials of Melquiades Estrada." That's a whole other thread though