Most profitable company in the tech world creates new product and uses prior manufacturing skill, brand awareness/loyalty, device lock-in, advertising experience and retail channels to sell it and makes more profit that arbitrary list of companies in different business areas. What's the point?
The point is that one little product is HUGE. Just MASSIVE. People may not think it’s very big because it’s such a small share of Apple’s revenue but it would be a success everyone talked about if a third party had got those numbers.