There is 5G and there is 5G mmWave. They are two separate parts of "5G". There are still advantages to sub 6GHz standard cell phone frequencies such as lower

There is 5G and there is 5G mmWave. They are two separate parts of "5G". There are still advantages to sub 6GHz standard cell phone frequencies such as lower latency and higher throughput. The disadvantages you mention only apply to 5G mmWave.