1) The odds of running into someone who thinks this IRL are slim to none. 2) The odds of running into said person who thinks that and them understanding that chart and explanation are even slimmer, by comparison.
My dad was reading stuff about it and questioned it at one point, which rocketed me into a whole fun day of looking up stuff about it and I got to teach him and he understood it and all was well
The key is to make it easy to grasp. Most people don't know that sunburns are literally just your skin getting irradiated, and that's interesting. And since it does deal with the electromagnetic spectrum, it IS possible to get sunburned and irradiated and end up with cancer from a router.. if you managed to make the oscillators inside start vibrating at inconceivably fast speeds. Which would just make the crystal inside shatter and explode, but for a few glorious picoseconds, you'd have a truly radioactive router.
So you're giving your audience the truth there, and confirming their beliefs, but it's an unrealistic scenario. Plus, all your things connected to wi-fi would have to have their receivers upgraded to the same insane speeds, and all you'd end up with is a super dangerous environment, and an abysmal range, due to higher frequencies not being able to travel as far as lower.
Okay, but your dad is probably a much more reasonable person compared to a woman who calls a telecoms tech support rep 4 times in a day angrily demanding to turn off the wi-fi waves ---