In some countries there are no 5ghz bands that don’t legally require DFS (which can kill your network for 30 minutes or so when interference is detected) and out where I live 5ghz usually doesn’t make it across half the house (land is cheap as crap and everyone builds crazy large houses on it.)

I have to wonder what you’re even doing that needs 5ghz, I guess you’re in the city and trying to escape interference?