Hi Aaron, you've got some pretty stupid notions about some real world circumstances, like even thinking that us Hams (Radio Amateurs) would even give you the time of day if you dared to operate outside the legal standards and rules codified into law by international treaties.
Also, as someone who's literally spent years completely off-grid killing and growing my own food and surviving in the wilderness, miles from the nearest humans, I can say unequivocally that you would not survive one single winter in the harsh and unforgiving environments I speak of without your thermostat, warrior keyboard, and electric light with forced air heating.
Now that we have that out of the way, I'll offer to you a couple of real world solutions that are already in production use that you can avail yourself of, considering you are suggesting that "someone" needs to develop such technologies -they have already, and you're welcome to leverage those communications systems here:
https://simplex.chat/ (Uses IP) #SimpleX
https://github.com/permissionlesstech/bitchat
The latter does NOT use IP (Internet, from your perspective). Instead, it depends upon BLE mesh, the otherwise premier surveillance network of choice by Amazon "Sidewalk", Google, and the same type of mesh networking that enables 3D GPS coordinate pinpointing of Apple AirTags.
#BitChat also has leveraging of WiFi mesh networks on the roadmap as well, and like #BLE, it is another network service that you typically CANNOT turn off (unlike regular Bluetooth and WiFi of your home SSID). Yes, it works nearby PtP & P2P at distances varying between 100 to occasionally 300 meters, where regular Bluetooth is 30 to 40 feet.
There are others, to be certain, but you should be able to deploy these without any handholding.
And stay off the Ham bands! We (licensed radio amateurs) don't tolerate miscreants such as yourself violating operating procedures or disrespecting the band plans for any given country - people like you and your fellow BOLSHEVIK pretenders should stay on 11 meters with all the other fucking poseurs.
Have a great day and I hope you find SimpleX and/or Bitchat to be valuable real world tools for solutions to meet your objectives, whatever they are, and in achieving the level of privacy and security that you require.
