Maybe it is because the best operating system, as proved by having the largest amount of profit, isn't available for sale to them?
That wouldn't be rational people. Rational people would know that nobody overpays and enjoys it, so it is very obvious to any rational person that this is not why people buy iPhones or Apple products. If you look a bit closer, you'll find for example that Macs are high quality products that Apple's competitors cannot match at the same price, even though Apple sells at some excellent profit. And the same with iPads, where Apple is not beaten on price by anyone, and still manages to make profits where others don't. And the same with phones, where Apple owns the high end market where the profits are.
And I despise the Android fanboys getting passive-aggressive and claim that rejecting their nonsense is some a sign of being a "fanboy" and being "defensive".