Want copy paste? It’s consistent across the whole system because you have one choice. You don’t have to guess how the pop up is going to work beyond context. Other more open platforms get messy and fragmented hoping the developer chose a good implementation.
Want encrypted messaging? Easy, just talk to other iPhones. Want less infection risk? Live in Apple’s walled garden. I get less calls from grandparents asking for iOS assistance than Android, the interface is more intuitively laid out.
Have years of apps purchased with no way to transfer without paying again? You’re probably not switching.