It isn't and never was solely about length. Value is a much more important consideration, and it is what people were arguing about when speaking of The Order. No one is trying to say that all games should last over x hours, just that you shouldn't be charging 60$ for a game that doesn't justify that price with its value.
There is a lot more to speak about when talking about game length such as what the game does with that time, but since this isn't a The Order thread, I will stay away from discussing those specifics...







