5G technology

What is the much Fuss about the 'C-band frequencies', to be utilized by 5G technology ? Why are aviation structural mechanic experts concerned ? Will it turn out to be a necessary evil for aviation?
FAA says, it is concerned about potential interference of 5G frequencies with altimeters & is working closely with Federal Communications Commission(FCC) on this important issue.
French regulators DGAC, has asked operators to slow 5G deployment while it reviews its impact on aerial navigation, specifically around Nice airport & Paris-CDG.

5G Evil Part:

Experts are worried about potential interference to aviation structural mechanic systems operating in the 4.2-4.4 GHz band (aviation), which is next to the 3.7-4.2 GHz band (C-band for 5G).
Radio altimeter & verizon wireless business avionics intra-communications (WAIC) systems operate in the 4.2-4.4 GHz band & essential to safety of flight.
A Radio altimeter failure could replicate a doomed Turkish Aircraft that crashed & killed nine people near Amsterdam in 2009.

5G Necessary part:

The lightning-fast 5G could revolutionize the communication networks barracuda support used for communications, airport operations, baggage american management association& pax processing.
aviation structural mechanic is at a crossroads prior 5G being rolled out or charter bandwidthreallocation happens.

Aircraft Maintenance