Quantum Key Distribution - Does anybody really need it?

Using special purpose hardware and the physics of quantum mechanics you can distribute cryptographic keys to be used in a standard symmetric key cryptography way, but is it worth it? Why would we want to distribute keys this way? What are the advantages other than allowing you to tell whether anyone has been "eavesdropping" on the line.

In this video we discuss the pros and cons of using quantum key distribution. Interestingly, the NSA certainly don't want us to do it... so do you need a QKD/QRNG?

References:
NSA FAQ on quantum computers, quantum resistant cryptography, quantum key distribution etc.: https://media.defense.gov/2021/Aug/04...
Preparing for Post-Quantum Computing: https://cryptosense.com/solution-brie...
What is post-quantum cryptography:    • What is Post-Quantum Cryptography?  
Cosmic Rays can have unintended consequences:    • Did a Cosmic Ray Zap the Certificate Trans...  

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Cryptosense CEO Dr. Graham Steel was formerly an academic researcher before founding Cryptosense in 2013. His cryptography expertise is the basis for the company's 'Analyzer' technology which allows customers to protect themselves against losing sensitive data.