Now a lot of games just want to be big, even if the variety of gameplay doesn't change. People get validation and a sense of achievement from their numbers going up. People like exploring a big place and running through long scripted social encounters even if there's no autonomy. It's now a long lasting source of social and personal progression that we don't get in real life nearly as easily.
Which is fine honestly. But when a designer fucks up the balance it becomes work because there is no choice but trudging through trivial, reused content to reach the next goal.