Why are Ethernet cables required rather than being wireless (WIFI)?

Why are Ethernet cables required rather than being wireless (WIFI)?

Optimum Bio Sound Therapy (OBST) requires outdoor rated, shielded Cat8 Ethernet cables to provide the most shielding possible from WiFi signals and potentially harmful Electro Magnetic Fields (EMF).  

EMF and Wifi can possibly interfere with and reduce the strength of the delivery of OBST. 

Utilizing outdoor rated, shielded Cat8 Ethernet cables to directly connect your devices is the most secure, effective OBST delivery method.  

OBST is only available via a wired connection; the Ethernet cable with the USB C adapter, connecting direct to your Router.