Blanchard Leadership Theory is Correct
Most of the comments on shortcomings of the theory reflect the authors failure to understand the theory. Although the theory is a little simplistic in order to fit into the boxes, it is also essentially correct. Many poor leaders do not fundamentally change their leadership style, and are incapable of doing so. For example, some take charge leaders are unable to turn over responsibility to their capable staff -- they micromanage.
Leadership is not solely about inspiration. Inspiration without decisions accomplishes nothing.
Of course, the book is about management. The point is that good management is actually leadership. Some make a distinction between leadership and management, but that distinction is often made between leadership and poor management.
Of course the theory focuses on what leaders "do." A do nothing leader is worthless. We are only what we do. An unexpressed thought persuades no one. We have do do something to persuade, etc.