I've heard that top brass at the DoD is fixated on 5G being critical to military superiority in the near future, without really having any practical understanding of its strengths and weaknesses or real world applications. But it's become a hot buzzword and an easy way to drum up money and attention. The fact that China is a major player is also helping funnel funding into many money-torching projects.
All of the statements I've seen from pentagon brass are extremely critical of the FCC's decisions to let 5G operate close to bands used for GPS and weather forecasting.
