I think it is, up until politics and managers come into play. If you leave to the team level, and you have some good senior people in a team that can also help

I think it is, up until politics and managers come into play. If you leave to the team level, and you have some good senior people in a team that can also help and guide junior developers, you can do great. In the end it depends on the people, and the biggest thing that can make or break this is the product owner. We had someone as a product owner who had absolutely no political play in the game, he was a designer that stepped in and understood the product. All he did was explain some quirks and come in to help if there are questions or things that are not clear. On the other hand, when the product owner tires to be a manager of the team and the processes, it all goes extremely wrong.