Here lies the problem with BG3. Everything is explained in books and novels but not IN THE GAME. Immersion and lore is really lacking. But I guess thats a Larian thing...
It's not Larian's fault at all. The lore has been expanding these past 17 years. Baldur's Gate is not a stand alone fantasy game, it is part of Dungeons & Dragons' Forgotten Realms campaign setting. Even games like Eye of the Beholder 1, 2 and 3, Pool of Radiance, Icewind Dale 1 and 2 and Neverwinter Nights 1 and 2 are set in the same world as the Baldur's Gate games.