And I say you're misusing this number and using it wrong.
Claiming that one companies smartphones is the biggest profit centre isn't a winning statistic to me.
Let me start by sayign: I Think the iPhone is a hell of a beautiful smartphone, that is well engineered, feels good in hand and looks great, and performs very well.
BUT:
It clearly puts in less technological items / stats / performance parts than many of the other people in the market. Apple's iPhones pricing and build are primarily focused on profit margins and not deliverying the highest, newest and best technologies available. Apple is fantastic company at refinement and thats what the iPhone is. It's a really good refinement of existing technologies, Most of which were pioneered by others, but refined into a nicer package on the iPhone.
Because of this, Apple charges full price flagship price, But, with overall less in it. Smaller Flash storage, Less RAM, lower resolution displays on older mroe mature (and cheaper to produce) LCD's. These cost savings for Apple, do not get passed along to the consumer. Instead, Apple pockets the difference as profits.
Eventually, And we're starting to see it in the market, this starts to feel like the "Apple Tax". You are literally paying more for an Apple device because it has the logo on it, Not because of any of the actual technology in the device. When you're a consumer and you hear that on every single iPhone sold, apple is earning almost 40% Pure profit off of your purchase, you start to wonder "why can't they afford to give us 32gb base?" or "Where's my 2-4GB ram base?". "where's my open NFC?", "where's my __________". Aside from iOS v Android debate right now, There is very little in an iPhone from a technological standpoint that makes the iPhone's hardware stand above and beyond most of the compteition. In fact, despite lower profits, many of the competition are selling items that are generally more "spec heavy" than iPhones.
So at the end of the day. As the consumer. Repeating "BUT APPPLE HAS 90% OF THE SMARTPHONE PROFITS" is actually a bad thing. Not a good thing. Knowing Apple is pocketting 40% of my purchase to give to Ive and Cook's already full pockets doesn't make me feel good about 90% profits in the industry. Especially with the Tax Avoidance and other legal issues that Apple has historically abused.
Apple makes some really nice products. But corporate ethics of theirs, and their rampant profiteering past reasonability makes Apple Co. ethically and morally questionable. And the 90% profit mantra just exemplifies that, NOT helps