That is true for any filesystem that needs defragging. The entire notion of a disk defragmentor is that it fixes the problem without needing to do this step.

That is true for any filesystem that needs defragging. The entire notion of a disk defragmentor is that it fixes the problem without needing to do this step. It's like saying "Our car never breaks down so you don't need to be able to repair it. Even if it does break down you can still walk."