Some people are worried about the electro magnetic radiation from WiFi and Cellphone signals etc.
Today I finished an installation where the owners rent out part of their home that includes free internet. At the same time they did not want to have WiFi in their part of the house while they are sleeping or even want to be able to randomly turn the WiFi off when not needed.
I installed a Ubiquity USG and setup a separate LAN for the two ports on this small router. Doing so the guest can’t get into the owners network and vise versa.
The LAN 1 for the guest unit is connected to a UniFi AP Lite that is set to the lowest power level and is intended to be on 24/7
The LAN 2 is connected to a small 5 port Netgear switch that connects the iMac, Apple TV and a 2nd UniFi AP Lite
In order to easily turn off/on the WiFi in the main house I used a remote controlled power switch with a keychain sized remote. No need to go into an app and disable the WiFi Access point. Just a simple click on a remote will do the job.
Its on the far side of the property and the power is set to the lowest level.
In the main house is way below the level of what comes in from the neighbors
I get what you are saying, just let them know that the 5G signal from their operator is more powerful than the Wifi - and it is always on and can’t be turned off.