I think enthusiasts come in all sizes and shapes and range in intelligence as per the normal population. I’m actually quite heartened when I see small children at the airport gates watching the planes.
one of my former 757 colleagues, had a thing for buses and used to get bus spotter monthly ......he completely brazened out any p... taking by leaving the mag around for us to peruse.
A couple of colleagues have a thing for steam engines, no big deal.