I think because gaming is demanding and it makes Apple too comparable, which may not be desirable. When you compare battery life and performance of your macboo

I think because gaming is demanding and it makes Apple too comparable, which may not be desirable. When you compare battery life and performance of your macbook you are comparing hardware + software together, and Apple controls the whole vertical and can optimize in both. With huge GPUs there would be less margins and less opportunity for optimizations. IMO Apple will never embrace gaming. The VR headset could be a success, but IMO not as a gaming device.