In the space of two days I had evolved two plans, wholly distinct, both of which were equally feasible. The point I am trying to bring out is that one does not plan and then try to make circumstances fit those plans. One tries to make plans fit the circumstances - George Patton
Any suggestion that plans and planning are not part of project management, no matter the approach - agile or traditional - wilfully ignores the purpose of a plan. That purpose is not the force the team to follow a path, but to illuminate the possible paths that can be followed to reach the goal.