A common definition of management is getting things done through others.
I don’t like that definition very much because it leaves out the human component. This definition could just as easily apply to machines. Why would we want to speak of people in the same way?
Further, you can “get things done through others” while chopping them up in the process.
I think a better definition is provided by Stephen Covey: management is developing people through tasks. This brings in the human component. Management is not just about getting things done, but developing people in the process.
The result is, ironically, that you will in turn be able to get even more done in the future, since whenever a manager’s team is productive they are at the same time increasing in their productive capacity.
But that is not why you manage in this way. You manage with this goal in mind because it is the right way to treat people — that is, because you are managing people, not machines.