Apparently our opinions are going to differ. That's cool.
As for iPhone users, I suspect, based on interaction with quite a few, that iMessage and Facetime are a couple of big reasons why many use the iPhone - in the US. Just as I am sure that interaction between Apple devices is also a reason. They are legitimate reasons for consumers to adopt and stay.
From my opinion, it should be about the apps and functions, not the OS. If I want Telegram as my messaging app of choice, if I want Teams as my collaboration tool, if I want Outlook as my email / calendar, if I want ... I should be able to use these on any OS that they are offered as my default tools and not locked into unwanted defaults. Just like I believe we should have multiple points of sale for said apps.
Anyway, good discussion and we appear to be on opposite sides of this issue.