Well, no, it’s about frequency (and wavelength). With higher and higher frequencies, the wavelengths are getting smaller and smaller, enough to match the sizes of cells, neural pathways, etc.
I’m not about to try this, but someone mentioned that you could stick a cockaroach in a microwave oven, dial it up to 11, and the beastie will happily keep scurrying around unfazed because it’s just physically smaller than the wavelengths being vomited into the chamber. It just doesn’t absorb those rays.
A small mouse, though… well, it won’t be pretty.
So now all your cells and such are being better “tuned” those ever-shrinking rays, and absorbing lots more than shortwave (which are obscenely long, all things considered). Hell, I had a 108” fiberglass whip antenna on my car, that was still only ¼-wave! And ceebee and 10m are pretty damned close in size.
Now we’re talking antennas whose sizes are miniscule, and sub-mm waves are going to be saturating the planet 24/7. I’m thinking Spartan was right for wanting to turn his house into a Faraday cage.
I’ll carry a phone in my bag, but not on my person. And I try to keep it away from me overnight. Should really just turn it off, ’cause it’ll still “wake up” when it’s time for my alarm to go off.
And, c’mon, people know about the hissing, buzzing, clicking, etc., that people hear when exposed to microwaves. Even experiments that spooks did to beam voices into peoples’ heads via microwaves. So those rays are absorbed in the body, and it’s been posited that the cranium makes a rather nice resonant cavity at those frequencies.
So hey, y’all are free to dismiss those warnings, but me, I’d rather try to minimise the chances of growing brain tumors, even if it does turn out to be a bunch of hooey. There’s enough garbage in the air, in the water, in the food, etc., that can be carcinogenic, mutagenic, oncogenic, all sorts of -genics, that I don’t mind erring on the side of caution.