In Situational Leadership, the Leader Determines the Situation
Trouble with Situational Leadership is: the model relies on the manager or leader to be the sole determinant of the employee's "ready, willing and able" status (whether or not we are aware of it). In case of a bossy (Editor: ~ordering) boss, especially in high pressure, urgent deadline times, can easily lead to the manager undermining the employee (the subsidiarity trap), 'telling', over "managing". Quite militaristic and arrogant and old-style in many ways. So the SL model should mainly be used as a guideline for discussion between bossy leaders and their subordinate.
SL is also heavily weighted to TASK, far less so to RELATIONSHIP. This implies that those with a dominant / aggressive style will "take to" the model more readily than those with an assertive but nurturing style ...