I doubt he forgets it, because it's not true. The 70% difference between retail price and cost to stamp a device at a factory is not "profit margin", because there are further costs, before and after manufacturing, such R&D, organizational and business costs. You can bet Apple is spending more on R&D than almost anyone else, so there is likely no wiggle room at all for anyone to compete on innovation, unless they aim for some niche market.