Android can't be secured unless it's stock with verified boot/ root of trust. Even then, the verified apps from the store leak your data at every opportunity, as does the OS. iPhone is the way to go
iPhones for example have had massive security issues in iMessage and still prevents other (more secure) apps to receive SMS. Why? iPhones could all be targeted with zero click attacks of Pegasus because they have a consistent OS throughout all devices.
Are iPhones bad because of this? - No! But iOS vs Android must not be a religion (same for Windows vs Unix)