Whether you like it or not, we are living in the Internet age. We have moved past the limits of Bluetooth syncing long ago. Nokia's own Windows Phone 7 based smartphones don't sync via Bluetooth either, neither will Android phones without additional third-party software.
Why restrict yourself to only being able to sync contacts or calendars when your phone is within a few metres of your powered up PC when you can easily, and automatically, sync from anywhere in the world (even without owning a PC)?
The iPhone is, and always has been, an Internet connected device. It's time to leave behind your old fashioned, slow, limited proximity syncing methods and embrace the 21st Century way of doing things.
So, the fact is: The iPhone doesn't offer Bluetooth syncing. If Bluetooth syncing is the highest priority feature of a phone for you, then the iPhone is not for you, and an "old Nokia" is about the only phone that will suit your needs.