My spouse’s father was a train guy. When he passed, she inherited a dozen or so photo albums of just trains. Very “normal” hobby.

I’m not sure about my dad. He was an anti-intellectual functioning alcoholic. But I’m pretty sure my grandfather was autistic. His special interest was in historical military equipment, which is “normal” so he got a pass.

Both of these people fell in love, had kids, paid taxes, hell, probably even played baseball. You know, all those things Secretary Brainworm said would never happen.