If DFU is low level and cleaner, why would anyone NOT chose to do so?
Because it's not as easy to do and most times is not needed. The same reason why people don't secure trash whatever they want to erase from their computer.
I'm curious now, is there a DFU mode for iPads as well?
If DFU is low level and cleaner, why would anyone NOT chose to do so?
...it's actually a little more trouble booting it back out of DFU - jailbreakers of course have programs like TinyUmbrella to do it.
As far as Apple are concerned once it's in DFU, you gotta restore it!