Slavery does something to the soul that outlasts the chains. A people ground down for generations forgets it was ever meant for anything else. So the first work of deliverance is not the exodus but the reminder of who is speaking and to whom. Before the shackles fall, the spirit has to be told it has a name and a destiny.
The stretched-out arm is not a gentle rescue. Bondage does not release its captives politely, and setting people free requires judgment against whatever profits from their suffering. Liberation costs something and confronts someone. A power willing to reach down into the pit and pull is the only kind that ever breaks a prison open.