You can absolutely do that, and there are several potential license and license-free options. None of them are amateur radio, however.
That's the problem - hn regularly has threads talking about how decentralized infrastructure is so important. Having a (dialup speed) p2p network that is built on long range connections would be insanely reliable and would probably revolutionize what we think of as the Internet.
- ISPs would be optional
- access to the internet would be the one-time cost of the hardware
- a totalitarian government trying to shutdown the internet would have to hunt down portable repeaters over hundreds of square miles
- the infrastructure would be in the hands of the people, not megacorps like verizon and comcast.
But that requires encryption, and spectrum allocations that can cover the distance.