> There is obvious large overlap. Both are nerdy and techy and attract similar base groups. But the ham space is dominated by people who want to be "good citizens" through collective action, while computer hacker is more about cyberpunk "if I could do it, then it's allowed".

I work professionally in point to point licensed microwave radio and there is very little overlap in our community of ISP/telco/network engineering people with analog ham radio enthusiasts. I don't know a single person who submits FCC coordinations and does high capacity PTP microwave who is also a "licensed" ham.

There is a bit of a disdain in serious radio work for things that operate in purely analog methods (we really only care about things that have native gigabit ethernet or better interfaces on them and can carry IP data), and the concept of not being able to use basic crypto either at the radio level or as a data payload is also anathema to professional use.

There are slightly more professional nerds doing things with meshtastic/meshcore and similar as a hobby, because messing about with small esp32 based things and similar (and specifically in the 900 MHz USA/Canada bands) in purely digital modes is closer to what we do for work. And has practical uses for low data rate SCADA/monitoring and text messaging uses.

There is also a perception that many ham radio enthusiasts who try to position themselves as some special and ultimate resource in disaster response scenarios are not really doing much useful. At a small local scale, maybe? But the people who operate county sized professional emergency communication radio networks (with real budgets from government money) serving sheriff/police/fire/ambulance response and similar also do not overlap a lot with ham radio enthusiasts. If you have the budget to build a $400,000 project of a hilltop radio tower site serving mission critical communications in your county and your main interactions are with the local sheriff's office and the local 911 PSAP, your perspective is going to be very different than the people who want to do all-analog in the clear ham radio for "disaster response".

In many modern emergency scenarios people expect to be able to communicate and share data using whatever they have on their phone or laptop as a wifi client, which means implementing portable two way satellite IP data over something like traditional VSAT, starlink, o3b, Oneweb, soon Amazon LEO, etc. It's also standard for serious disaster response vehicles operated by well funded government agencies to have something like a docked handheld Iridium phone.

eBay Restricts Listings of Radio Equipment, but Exempts Ham-Band-Only Gear