Re: "The iPhone – Apple's hottest seller – brought in revenues of $65.597bn"
Let me give you my the example of my wife:
Her iPhone SE from the last decade was no longer in support (or so she believed). She bought an iPhone 11 as a replacement. It will last her until it is out of support later on this decade.
She got an iPhone because it is easy to control what and for long our (young) teenage children use their iPhones. She had tried parental controls on an Android phone which did not work at all.
Maybe she got the wrong app or maybe she configured it wrong but since the parental controls worked well and easily on the iPhone, and since she was familiar with the iPhone, it made sense for her to stick with the iPhone. Make it easy and agreeable for the customer.