Helix with Wired-Only setup, or how to turn off WiFi

For others wondering about this: I can confirm this is not possible. I talked to a Videotron tech representative last week who was sincerely trying to be helpful and told me (and I believe he believed it) that you can turn off the 2.4 GHz and 5 GHz antennas via the web gateway (10.0.0.1). 

Believing this to be true, my friend got a subscription. Well, it turns out the WiFi antennas are not actually turned off (no RF transmission) when disabling WiFi (both the 2.4 AND 5 GHz individually) through the gateway. It was easy to verify this by using an RF metre, as someone else did on this forum a few years ago. The Helix box continues to put out RF radiation— 3 million microwatts / m^2, as it normally does when the WiFi is on. 

This is also the case if you put the Helix gateway in bridge mode (which is supposed to turn off WiFi antennas as explained to me by tech support last week).

It's unfortunate. I was considering switching to Videotron (I'm with a different company that uses Videotron infrastructure, but uses routers where turning off the 2.4 and 5 GHz actually works). My friend will be returning the equipment and will be seeking Internet from another company as well. I'm surprised this problem has not been solved, some years after another customer reported it (see below). 

https://forum.videotron.com/t5/internet-telephony/wi-fi-seems-to-be-always-on/td-p/21988