Same reason that people stick with Google.
After years in the eco-system it is obnoxious to swap, and the other main competitor isn’t any better of a company to deal with.
At least with Android I have options. Do I want USB-C? There’s a phone for that. Do I not want USB-C (for some weird reason)? There’s a phone for that.
Options are definitely nice for those technical enough to understand and use them.
Though personally I am keeping an eye on Linux devices for my next upgrade.
Do I not want USB-C (for some weird reason)?
This is probably temporary until it is time to move past USB-C. Which will be a slower and more difficult process now that there are laws in place requiring it.