Cutting is cutting, right? Wrong. One incorrect cut can be very costly. If the metal is expensive, you have just lost the cost of the entire sheet. Regardless of the cost of the metal itself, if the cut is incorrect, your final product may not function properly.
You are precise in your designs, precise in your assembly and precise in the way you run your business. Why would you want anything less than perfection when it comes to the parts that you use for your final product?