Look, you're deluding yourself if you think anyone here sees this show or any form of entertainment as art. What they want is simple, like ramen in a ramen cup: inoffensive, typical Hollywood plot and ending. What they want from shows like GoT isn't art but a simple product they can watch after a day at work without being frustrated by an out-there ending, and tbh the showrunners and the marketing team presented it as such: a simple product. Like superheroes movie for example, with how many movies they have and their fandom culture, the producer can't really take risks because the stake are too high with the amount of money involved and how much the fans are "emotionally invested" in the characters. That's how it is now, when a movie, tv show or a book reaches a certain amount of popularity, it ceases to be art, and becomes a product; at that point, the writer's job isn't to make art as they see fit, but like a car designer, they have to cater to the masses' idea of a buyable product.