I think you might be underestimating the intensity of some people’s interests and how much of their being is defined by them, especially non-neurotypical people.
EDIT: Like, if you live in a van with solar panels on the roof you should probably find a partner that’s also cool living inside a van.
If you spend a significant stints at home wearing a fursuit, you should probably find a partner that enjoys or at least doesn’t mind living with what looks like an anthropomorphic furry creature.
If you regularly consume large doses of halcinogens to explore the limits of human consciousness you should probably find a partner that’s doesn’t mind hearing about how you saw an infinite blade made of time that slices the present moment into two parts: the past and the future.