A ton. The larger point is that they are given an opportunity to do something different otherwise we will not what what actually is possible.Sometimes, these "talented professionals," aren't really any more talented than anyone else. I've seen plenty of TV shows, movies, etc that left me wondering if they were written by morons and/or clueless idiots. There are countless examples of TV shows that never made it past their first season because they weren't good. How many movies have been utter flops?
An example that springs readily to min is the Star Wars Prequels. One author I read discussed the importance of the prequels because the prequels paved the way for doing new Star Wars stories. A lot of SW stories were not able to get past Empire vs. Rebellion, and so made it difficult to come up with something new. The new allowed an influx of ideas that people would not have considered had the PT not been made.