For some people the collecting aspect "collecting" countries, countries, continents, grid squares.
Some people like chatting with people from far away lands (when your father started it might have been the only affordable way to talk with people from foreign countries). Sort of like Omegle, but with less masturbators and dicks.
SOme people like the technical challenge, like the EME folks who bounce their communications from the moon.
Or the microwave nuts who build their own gear and try to push technical boundaries.
For me it is about the technologyu. I gan legaly experiment and play around with tech, . And even better, there are other folks around the world who are just as crazy as I am!
I'm working on building a transceiver for 76GHz and I'm not the first nor alone.
Target power output is 10mW btw, if the cheap mixer diodes can take it.