Yeah right. When it comes to management one person cannot do it all alone. And there are persons who are gifted or should i say talented in some specific areas. Since the management of a club comprises of management of the players and management of the affairs of the club. A coach should be given full right to manage the players given to him to work with. He should have the right to decide who to choose to join the team so that such players will execute the plans he had for the team. Most time the player given to a coach is one that has been highly hyped which is not what the coach wants for the team yet he will have no choice but to manage such players.
Generally managing a team comes with a whole lot and that is why it's further divided into segments one of which is the management of the players usually headed by a coach, to be very particular there's a head coach underneath which are his assistants and other crew members who help to make coaching a bit easier because if the complete management of the players is left to the head coach alone,
I doubt if he will be able to completely handle the players week enough a d still get to meet up with other aspects of his job because I believe beyond player management, the coach still have other things he is supposed to handle in the team and that's where the Assistant and other crew members comes in. The liberty of the coach to pick players who he thinks he can work with at any particular time is not always given completely but then, it will actually go a long way helping the coach get to been able to put the team in the best shape and getting the kind of results be desires to get a d that which is expected of him by the management.
Sometimes it could be that the team is trying to achieve a certain goal and would bring in certain players for the coach to work with and for reasons of abuse of power, sometimes, some teams don't give the coach the Total power to manage