There is a big block of spectrum around 5GHz for unlicensed use, and another huge one in the 6GHz about to be opened up.

The trouble is that protocols like ZigBee and ZWave and Bluetooth and ANT+ are stuck in the 2.4 GHz band and practically you cannot turn off your 2.4 WiFi access points and be happy.

Thus I have to go to the woods to pair my fitness band with the heart rate sensor because at my house who knows what is going on with the hue light that is on the wrong side of my monitor from the hue hub or the smoke detector that posts the battery status to SmartThings, etc.