SMS works because the cell phone companies pay the big bucks to their base stations up very high above surrounding terrain.
There are transient exceptions like atmospheric gradients in water vapor density creating brief tropospheric ducts which VHF radio can bounce down but these are unreliable. And tropospheric scattering propagation requires very high powers and high gain antennas at both ends so it's not really feasible for people operating under FCC part 15 or even ham radio power restrictions (ie, <1500 watts).
The perfect application is IoT, where a lot of use cases like telemetry, agriculture, etc. require only small data packets transmitted with longer (tens of minutes / hours) intervals.
Many years ago (pre-LoRa) I needed to integrate a garage door that was far out of Wifi range to my home automation system.
At the time the way to go about this was (as best as I could tell) XBee. I was able to conjure together a 900 MHz XBee module in the garage that not only had (essentially) GPIO to activate a momentary relay to simulate a button push to control the door but also utilize an XBee feature called change detection that has an eventing/push system to transmit state changes from high to low on a pin. Combined with a magnetic door contact sensor and XBee + ESP 8266 + Arduino (platform for ESP 8266, not device) + MQTT on the Home Assistant side this thing has been running rock solid for a decade. I haven't had to work on it since.
Whether I check the status of the door (via Home Assistant or the OLED display on the control unit inside) or open/close the door via the momentary switch inside (or Home Assistant) even though it's been 10 years at least once I week I remark at how amazing the entire contraption is.
This stuff is really cool and maybe it's time to move this thing to LoRa!
But something like solar powered sensor somewhere farther away would be a good use case.
Some gateways let you filter by network_id, this will not stop someone from pulliting/disrupting the radio spectrum, but it will stop your gateway from relaying those packets to your network-server.
There is none, there are only tradeoffs.
You're basically directly trading off range for speed and power usage.
Quicker chirps allow for both higher speed and lower power usage per byte transferred, but your range will be that much lower
Lora on 2.4 GHz can probably provide the higher bandwidth required for voice albeit at a lower range compared to the sub-GHz version. look up SX1280.
Let's not fall into the proprietary trap again.
Because this also applies to base stations the throughput is highly constrained.