I feel better if I completely turn off WiFi or Bluetooth. I can see I'm exposed to plenty of other signals by living in a city but it doesn't mean they're nothing. It just removes the added damage being done and it makes quite a difference to quality of life which would be hard to imagine for you.

My ammature theory (5Ghz wifi feels worse than 2.4Ghz wifi) also says higher frequency for short range signals does more harm, thus it's more sensitive to turn those off than being exposed to other lower frequency used outside.