Do you believe that Scrum and Large Scale Scrum enable great opportunities for the benefits of organizations adopting them properly?
Some people just believe because they witnessed it, even when it is not very logical from their perspective.
Others do not believe because they have own mental models and refuse arguments from others...
Many just do not really understand what it is.
I do not need to believe - I just know for sure. Because I know what it is very well, I find it absolutely logical and I witnessed it in many cases:
My mission is to help people to find their way not to blindly believe, but to know for sure. Therefore, people should employ system thinking and consider not only the Scrum Team (Product Group) but the whole organization as a system - the "Environment" in the Agile Principle: "Build projects around motivated individuals. Give them the environment and support they need, and trust them to get the job done."