Because some iPhone users are so dense that they don’t understand that they are being forced into using an app to send messages over SMS (iMessage). Because Apple automatically “upgrades” imessage users to a better experience, the thought is that iPhones are better - not that they’re being forced to use an app. Because Android users can’t install an app to ensure compatibility with iMessage, it appears that Android devices are “not as good”. The response from those with iPhones is to “just buy an iPhone”, when all they’d have to do is install a free app. They’re so deep in the walled garden they don’t see it for what it is, a prison.