Because ham radio is fun. It's a different hobby than the other myriad ways of communications which you describe. It's a radio service explicitly dedicated to t

Because ham radio is fun. It's a different hobby than the other myriad ways of communications which you describe. It's a radio service explicitly dedicated to the personal enjoyment of radio. It is not a personal communication service in the likes of FRS, GMRS, or even part 15 (wifi), microwave, or cellular networks. Think of ham radio as a sandbox for radio experimentation. There is a LOT to ham radio that you've overlooked. It is however unfortunate for many commenters on HN is that encryption is not allowed on amateur spectrum, but it's important that it stays this way. The amateur radio spectrum is worth billions of dollars to the telecom industry, but we've been fortunate to have it protected by the FCC (in the US) and international agreements. If encryption were allowed, there would be no reasonable means of verifying that a communication on ham radio is compliant to its regulations, especially those preventing communications of a pecuniary interest. In other words, encryption would open the doors to telecom companies and other businesses to use amateur spectrum instead of acquiring a license for radio services that would otherwise suit their needs, i.e. an illegal workaround to save money from licensing fees. Encryption also puts a downer on the spirit of ham radio, which is built on random conversations between the technically minded folk on ham radio to share information and knowledge of ham radio itself. You can't drop in on an encrypted conversation. There could be changes to regulations that would mitigate these concerns (for example periodic unencrypted plain text/voice identification, private keys made public and broadly shared, etc), but such changes would be hard to come by, especially blocked by international bureaucratic processes, and a lot of the "old guard" fearful for the state of their hobby were encryption to be allowed. Ham radio also has a broad base of experienced communications volunteers, which comes in handy during earthquakes, hurricanes, rural/remote search and rescue, in which the amateur service supplants ruined communications infrastructure while telecommunications companies and governments mobilize their recovery efforts. Examples include 9/11, Hurricanes Katrina, Maria, Irma, Andrew, and more, numerous fires in the west US, earthquakes of Haiti, Iran, China, and Indonesia; and even plays a role in ground-truth tornado spotting and tracking.