Paradoxically, success is one of the main reasons for the failure of good ideas, whether they’re religious, political, or “Agile”. Good frameworks appear simple, but they are generally deep. They require careful attention to be done well. They require learning and mindful application.
Yet when some framework of ideas gains success, it gains followers. The faster it grows, the more its adherents tend to be beginners. The more popular it becomes, the more its adherents are only superficially engaged with the deep ideas that contain the real value of the framework.