No I am not saying that - how did you infer this? As
@SweetAction already correctly pointed out these types of headsets are supported by the OS. So these work out of the box with 3CX. The special integration is only needed for the "in ear" answer button in the case of a desktop app. (mobile app already supports it natively)
In fact i want to add i really recommend use of off the shelf headsets. Installing drivers on the OS, then having to support these over the years i believe is a hassle for users, admins, partners and of course 3CX.
Also i think there are health benefits to not having a DECT transmitter with the power of a microwave in your head 8 hours a day.