Ham radio is a hugely diverse hobby these days.
Personally, I had been thinking about getting my license, but finally did it as a extra skill for my SAR team application. As the younger guy with the rope skills, I got into infrastructure work. Towers and antennas and remote cameras and microwave links, etc.
People are into everything from mesh networking to digitally encoded communication methods to hiking to remote mountaintops and seeing how many people you can contact to building prepper type SHTF communication systems to contesting and seeing how many/how far contacts you can make to setting up data collection systems for scientific research to supporting public safety, large events, and emergency communications. And a lot more I'm not coming up with off the top of my head.
My local radio club was in an area with a lot of retired defense and aerospace type engineers but it also had younger folks from tech, media and anything else type backgrounds.