Laser cutting is a lot quicker than traditional mechanical cutting methods. Especially in the case of more complex cuts.
When comparing it to other thermal cutting methods like plasma or flame cutting, laser beats them in speed up to a certain thickness which is around 10 mm. The exact advantage point boils down to the power of the laser cutter, though.
Automation
The job needs little manpower as contemporary laser cutting machinery is highly automated. An experienced machine operator still plays a big role in the final quality but the speed of cutting and little need for manual labour result in lower costs compared to other cutting methods.