I cannot confirm this, but then again: I’m not a professional gamer either.
From what I understand, because it performs better than Bluetooth. Instead they still use the proprietary radio signal from Microsoft. Note that when connected to a XBox One, even these Bluetooth enabled controllers will not use Bluetooth. Newer models, first made available with the release of the XBox One S, are equipped with Bluetooth, making it much easier to connect your controller to a device wireless (even iOS and Android now support this).
These are NOT the same dongles as used with 360 Controllers! To work with those controllers, you will need a USB dongle, like the ones listed here at Amazon. Your Mac (or any computer for that matter) will not have the needed transceiver to setup communication. They solely rely on the proprietary radio signal from Microsoft. Unfortunately … The old generation of XBox One controllers do not come with a standard wireless way to communicate with your Mac. Bluetooth – Which controller do you have?