“Apple could very easily have forgone forging to create stainless steel cases, just like everyone else”

Its true. They could have. Hardening gold alloy with cold-working could have been eliminated. But that would make them on par with the rest of the industry. Apple wishes to stand out with a perfect product.  As an example of their dedication, no one will see or feel the inside pocket for the microphone on the Sport Watch, yet it has been laser finished to perfection. Apple are upping the standard as to compete with companies with many more years experience in the industry.