Comment by MisterTea

Because LoraWAN was designed for low power, intermittent/sporadic communication from battery/solar operated things spread out over a wide area. It's bandwidth is limited to 50kbits/sec per channel so its design is for sending small messages. Perfect use case would be something like a farm where you want to monitor dozens of small things such as the temperature in the barn, water level in a stock tank, monitor an irrigation system, monitor soil conditions, etc.