"Terminator" Just Got Deeper

So, I was watching "Terminator" last night, the original, where Arny was the bad guy, and I had a thought.

There is one point where Reese, the guy trying to save Sarah Connor from the Terminator, is speaking to Sarah and mentions that in the future, the machines have taken control of everything. My personal understanding of this is that the machines had taken control of computers, mechanics, communications...essentially anything that was somehow connected to a mechanical device and was part of some sort of network system. I mean, I would assume that something like a personal transport vehicle, unless captured by the machines and given a brain, would still run independently of the tyranical machine world.

That being said, this guy Reese has a couple of flashbacks, or flashforwards, if you will, to his fighting in the field against the machines. These flashforwards are shot in the dark, the sun probably being demolished in some sort of nuclear explosion, and it's a little hard to see the kind of equipment these humans are carrying around with them. But, at one point, it is very clear that Reese has on a wireless headset, most likely used for in-field communication.

My thought is simply this...if you know that machines have control of everything, why would you use radio as a means of communication? I mean, it seems a little silly doesn't it? I would think that machines of all things would have an easy time intercepting vital communication and using it to their advantage, right? This just doesn't seem like a very bright maneuver.

I realize that nuclear war and machines taking control is sort of a bleak outlook of our future, but do we really have to add insult to injury by assuming that humans are stupid? Or is the illusion of humans as intelligent beings based on the fact that we use machines instead of our own minds, and by not having them as slaves, we are thus forced to recognize the reality that we humans, in general, are morons...or maybe we just live in blissful ignorance of that fact and blame others for our own shortcomings...or maybe it was just a cool accessory for the future that the director and wardrobe person decided on for the sake of filming and never really expect anyone to spend this much time thinking about it.