Well, you have to somehow grab the attention of potential buyers. It's hard to find the balance between a good story and grabbing attention.
Most buyers don't know the stories of the individual characters before buying.
Yes, but between saving the world, Dragons, Illithids, playing a Tiefling/Drow/Vampire/Githyanki and having lots of beautiful women (Okay, right now that is contestable) there isn't much left to grab attention even more.
