But your wifi can't see you in your house if you simply turn it off. If you're using a computer (or a TV) with a direct connection, you don't need wifi.
That’s when they turn on the imbedded Camera in Your TV that is using 1 Pixel as the Camera Lens.
The same thing that Your Smartphone uses when You reverse the camera so You can take a Selfie.
Unless you live way out in a rural area, you’re probably within range of your neighbor’s wifi. Plus anyone could bring equipment in close to you. Privacy has quickly evaporated.