That is a fair question and one that I asked myself. The distinction is that trail cameras are fire and forget. You set them up and leave and that is my problem. They require very little effort, in fact, if you have the money and cell coverage you don't even have to go out and remove the cards to see the pictures, you can have them sent to you automatically.
Look, I love technology as much as the next guy but this is a bad idea. It causes more conflict then it is worth, creates a dependence on technology, takes away from the experience we are supposed to be out there for, feeds the bigger or bust score frenzy that we are currently in, and I just don't think it is sporting. It is the hunters equivalent of facebook...interesting and cool on its face but ultimately unnecessary and distasteful if not destructive.
The items you mentioned require me to be there on the job to operate them. Not so with the trail cameras. By the way, I hope nobody takes my opposition to these devices as encouragement to vandalize them because that is absolutely not the case. When I see them I leave them alone. Not my property and not my way of handling things. Golden Rule stuff.
Your question reminds me of one that one of my readers sent me regarding gear for a muzzle loader hunt he was prepping for. I asked him why he went through all the trouble of the whole muzzle loader thing and he responded that he appreciated the way it used to be done by the mountain men and that he wanted to stay as true to that technology as he could. So I asked him why he included a rangefinder in his list. Good point, I never thought of that was his response. I hear that a lot.
Wade
www.HardcoreOutdoor.com